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125421121 = 7171053959
BaseRepresentation
bin1110111100111…
…00011001000001
322202000001102201
413132130121001
5224101433441
620240113201
73052030150
oct736343101
9282001381
10125421121
1164884821
1236005801
131cca45a7
141292b597
15b026c31
hex779c641

125421121 has 8 divisors (see below), whose sum is σ = 151770240. Its totient is φ = 101179968.

The previous prime is 125421059. The next prime is 125421137. The reversal of 125421121 is 121124521.

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 125421121 - 27 = 125420993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125421151) 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, 526861 + ... + 527098.

It is an arithmetic number, because the mean of its divisors is an integer number (18971280).

Almost surely, 2125421121 is an apocalyptic number.

It is an amenable number.

125421121 is a deficient number, since it is larger than the sum of its proper divisors (26349119).

125421121 is a wasteful number, since it uses less digits than its factorization.

125421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053983.

The product of its digits is 160, while the sum is 19.

The square root of 125421121 is about 11199.1571557863. The cubic root of 125421121 is about 500.5608652917.

Adding to 125421121 its reverse (121124521), we get a palindrome (246545642).

The spelling of 125421121 in words is "one hundred twenty-five million, four hundred twenty-one thousand, one hundred twenty-one".

Divisors: 1 7 17 119 1053959 7377713 17917303 125421121