12925781 has 4 divisors (see below), whose sum is σ = 14100864. Its totient is φ = 11750700.

The previous prime is 12925771. The next prime is 12925807. The reversal of 12925781 is 18752921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12925781 - 2¹⁴ = 12909397 is a prime.

It is a super-2 number, since 2×12925781² = 334151628919922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12925721) 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, 587525 + ... + 587546.

It is an arithmetic number, because the mean of its divisors is an integer number (3525216).

Almost surely, 2^12925781 is an apocalyptic number.

12925781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12925781 is a deficient number, since it is larger than the sum of its proper divisors (1175083).

12925781 is a wasteful number, since it uses less digits than its factorization.

12925781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175082.

The product of its digits is 10080, while the sum is 35.

The square root of 12925781 is about 3595.2442197993. The cubic root of 12925781 is about 234.6851434513.

The spelling of 12925781 in words is "twelve million, nine hundred twenty-five thousand, seven hundred eighty-one".