12551857 has 2 divisors, whose sum is σ = 12551858. Its totient is φ = 12551856.

The previous prime is 12551789. The next prime is 12551873. The reversal of 12551857 is 75815521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11451456 + 1100401 = 3384^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551857 - 2¹¹ = 12549809 is a prime.

It is a super-2 number, since 2×12551857² = 315098228296898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12551257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275928 + 6275929.

It is an arithmetic number, because the mean of its divisors is an integer number (6275929).

Almost surely, 2^12551857 is an apocalyptic number.

It is an amenable number.

12551857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551857 is an equidigital number, since it uses as much as digits as its factorization.

12551857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 34.

The square root of 12551857 is about 3542.8600028790. The cubic root of 12551857 is about 232.3999307285.

The spelling of 12551857 in words is "twelve million, five hundred fifty-one thousand, eight hundred fifty-seven".