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1000251421 = 13261729401
BaseRepresentation
bin111011100111101…
…010000000011101
32120201011000222221
4323213222000131
54022031021141
6243130505341
733533665621
oct7347520035
92521130887
101000251421
11473685774
1223ab95251
1312c2c7760
1496bb5181
155cc30bd1
hex3b9ea01d

1000251421 has 8 divisors (see below), whose sum is σ = 1077642104. Its totient is φ = 922924800.

The previous prime is 1000251407. The next prime is 1000251449. The reversal of 1000251421 is 1241520001.

It can be written as a sum of positive squares in 4 ways, for example, as 81252196 + 918999225 = 9014^2 + 30315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000251421 - 217 = 1000120349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000251395 and 1000251404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000251481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19321 + ... + 48721.

It is an arithmetic number, because the mean of its divisors is an integer number (134705263).

Almost surely, 21000251421 is an apocalyptic number.

It is an amenable number.

1000251421 is a deficient number, since it is larger than the sum of its proper divisors (77390683).

1000251421 is a wasteful number, since it uses less digits than its factorization.

1000251421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32031.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1000251421 is about 31626.7516669038. The cubic root of 1000251421 is about 1000.0837999774.

Adding to 1000251421 its reverse (1241520001), we get a palindrome (2241771422).

The spelling of 1000251421 in words is "one billion, two hundred fifty-one thousand, four hundred twenty-one".

Divisors: 1 13 2617 29401 34021 382213 76942417 1000251421