912257081 has 2 divisors, whose sum is σ = 912257082. Its totient is φ = 912257080.

The previous prime is 912256963. The next prime is 912257113. The reversal of 912257081 is 180752219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 805651456 + 106605625 = 28384^2 + 10325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-912257081 is a prime.

It is a super-2 number, since 2×912257081² = 1664425963669281122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (912277081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456128540 + 456128541.

It is an arithmetic number, because the mean of its divisors is an integer number (456128541).

Almost surely, 2^912257081 is an apocalyptic number.

912257081 is the 16145-th centered heptagonal number.

It is an amenable number.

912257081 is a deficient number, since it is larger than the sum of its proper divisors (1).

912257081 is an equidigital number, since it uses as much as digits as its factorization.

912257081 is an evil number, because the sum of its binary digits is even.

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

The square root of 912257081 is about 30203.5938424552. The cubic root of 912257081 is about 969.8526296821.

The spelling of 912257081 in words is "nine hundred twelve million, two hundred fifty-seven thousand, eighty-one".