1257412390 has 48 divisors (see below), whose sum is σ = 2530002816. Its totient is φ = 449280000.

The previous prime is 1257412379. The next prime is 1257412391. The reversal of 1257412390 is 932147521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257412391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40390 + ... + 64390.

It is an arithmetic number, because the mean of its divisors is an integer number (52708392).

Almost surely, 2^1257412390 is an apocalyptic number.

1257412390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257412390 is an abundant number, since it is smaller than the sum of its proper divisors (1272590426).

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

1257412390 is a wasteful number, since it uses less digits than its factorization.

1257412390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24065 (or 24052 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1257412390 is about 35460.0111393102. The cubic root of 1257412390 is about 1079.3424180564.

It can be divided in two parts, 12574 and 12390, that added together give a square (24964 = 158²).

The spelling of 1257412390 in words is "one billion, two hundred fifty-seven million, four hundred twelve thousand, three hundred ninety".