1256467740 has 96 divisors (see below), whose sum is σ = 3927280896. Its totient is φ = 297507840.

The previous prime is 1256467711. The next prime is 1256467757. The reversal of 1256467740 is 477646521.

It is a super-2 number, since 2×1256467740² = 3157422363321415200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1256467692 and 1256467701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6244 + ... + 50516.

It is an arithmetic number, because the mean of its divisors is an integer number (40909176).

Almost surely, 2^1256467740 is an apocalyptic number.

1256467740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256467740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1963640448).

1256467740 is an abundant number, since it is smaller than the sum of its proper divisors (2670813156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256467740 is a wasteful number, since it uses less digits than its factorization.

1256467740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44339 (or 44337 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 1256467740 is about 35446.6887028958. The cubic root of 1256467740 is about 1079.0720595911.

It can be divided in two parts, 125646 and 7740, that added together give a triangular number (133386 = T₅₁₆).

The spelling of 1256467740 in words is "one billion, two hundred fifty-six million, four hundred sixty-seven thousand, seven hundred forty".