1256941238 has 48 divisors (see below), whose sum is σ = 2317952880. Its totient is φ = 508286016.

The previous prime is 1256941207. The next prime is 1256941253. The reversal of 1256941238 is 8321496521.

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

It is a junction number, because it is equal to n+sod(n) for n = 1256941195 and 1256941204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 514556 + ... + 516992.

It is an arithmetic number, because the mean of its divisors is an integer number (48290685).

Almost surely, 2^1256941238 is an apocalyptic number.

1256941238 is a deficient number, since it is larger than the sum of its proper divisors (1061011642).

1256941238 is a wasteful number, since it uses less digits than its factorization.

1256941238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2742 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 1256941238 is about 35453.3670897420. The cubic root of 1256941238 is about 1079.2075914681.

The spelling of 1256941238 in words is "one billion, two hundred fifty-six million, nine hundred forty-one thousand, two hundred thirty-eight".