1256854040 has 32 divisors (see below), whose sum is σ = 3045455280. Its totient is φ = 464068992.

The previous prime is 1256854019. The next prime is 1256854061. The reversal of 1256854040 is 404586521.

It is an interprime number because it is at equal distance from previous prime (1256854019) and next prime (1256854061).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207994 + ... + 1209033.

Almost surely, 2^1256854040 is an apocalyptic number.

1256854040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256854040 is an abundant number, since it is smaller than the sum of its proper divisors (1788601240).

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

1256854040 is a wasteful number, since it uses less digits than its factorization.

1256854040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417051 (or 2417047 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 1256854040 is about 35452.1373121565. The cubic root of 1256854040 is about 1079.1826348732.

The spelling of 1256854040 in words is "one billion, two hundred fifty-six million, eight hundred fifty-four thousand, forty".