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12042901 = 13926377
BaseRepresentation
bin101101111100…
…001010010101
3211122211202101
4231330022111
511040333101
61110042101
7204235333
oct55741225
924584671
1012042901
116886012
124049331
1326586a0
141856b53
1510cd401
hexb7c295

12042901 has 4 divisors (see below), whose sum is σ = 12969292. Its totient is φ = 11116512.

The previous prime is 12042893. The next prime is 12042907. The reversal of 12042901 is 10924021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10924021 = 43254047.

It can be written as a sum of positive squares in 2 ways, for example, as 3783025 + 8259876 = 1945^2 + 2874^2 .

It is a cyclic number.

It is not a de Polignac number, because 12042901 - 23 = 12042893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463176 + ... + 463201.

It is an arithmetic number, because the mean of its divisors is an integer number (3242323).

Almost surely, 212042901 is an apocalyptic number.

It is an amenable number.

12042901 is a deficient number, since it is larger than the sum of its proper divisors (926391).

12042901 is an equidigital number, since it uses as much as digits as its factorization.

12042901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926390.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12042901 is about 3470.2883165524. The cubic root of 12042901 is about 229.2153539457.

Adding to 12042901 its reverse (10924021), we get a palindrome (22966922).

The spelling of 12042901 in words is "twelve million, forty-two thousand, nine hundred one".

Divisors: 1 13 926377 12042901