1256418916 has 27 divisors (see below), whose sum is σ = 2264491929. Its totient is φ = 609954768.

The previous prime is 1256418913. The next prime is 1256418967. The reversal of 1256418916 is 6198146521.

The square root of 1256418916 is 35446.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1124260900 + 132158016 = 33530^2 + 11496^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256418913) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2622765 + ... + 2623243.

Almost surely, 2^1256418916 is an apocalyptic number.

1256418916 is the 35446-th square number.

It is an amenable number.

1256418916 is a deficient number, since it is larger than the sum of its proper divisors (1008073013).

1256418916 is an frugal number, since it uses more digits than its factorization.

1256418916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 518 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The cubic root of 1256418916 is about 1079.0580824988.

The spelling of 1256418916 in words is "one billion, two hundred fifty-six million, four hundred eighteen thousand, nine hundred sixteen".