5256981 has 10 divisors (see below), whose sum is σ = 7853142. Its totient is φ = 3504600.

The previous prime is 5256967. The next prime is 5256989. The reversal of 5256981 is 1896525.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5062500 + 194481 = 2250^2 + 441^2 .

It is not a de Polignac number, because 5256981 - 2⁹ = 5256469 is a prime.

It is a super-2 number, since 2×5256981² = 55271698468722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256989) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32370 + ... + 32531.

Almost surely, 2^5256981 is an apocalyptic number.

It is an amenable number.

5256981 is a deficient number, since it is larger than the sum of its proper divisors (2596161).

5256981 is an equidigital number, since it uses as much as digits as its factorization.

5256981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64913 (or 64904 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 5256981 is about 2292.8107204913. The cubic root of 5256981 is about 173.8783334960.

It can be divided in two parts, 52569 and 81, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 5256981 in words is "five million, two hundred fifty-six thousand, nine hundred eighty-one".