1256256254 has 8 divisors (see below), whose sum is σ = 2055692088. Its totient is φ = 571025560.

The previous prime is 1256256247. The next prime is 1256256257. The reversal of 1256256254 is 4526526521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1256256254² = 3156359551428225032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256256257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28551257 + ... + 28551300.

It is an arithmetic number, because the mean of its divisors is an integer number (256961511).

Almost surely, 2^1256256254 is an apocalyptic number.

1256256254 is a deficient number, since it is larger than the sum of its proper divisors (799435834).

1256256254 is a wasteful number, since it uses less digits than its factorization.

1256256254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57102570.

The product of its digits is 144000, while the sum is 38.

The square root of 1256256254 is about 35443.7054214144. The cubic root of 1256256254 is about 1079.0115138163.

The spelling of 1256256254 in words is "one billion, two hundred fifty-six million, two hundred fifty-six thousand, two hundred fifty-four".