1257419490 has 32 divisors (see below), whose sum is σ = 3036332736. Its totient is φ = 333253440.

The previous prime is 1257419477. The next prime is 1257419519. The reversal of 1257419490 is 949147521.

It is a super-2 number, since 2×1257419490² = 3162207547663720200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123681 + ... + 133460.

It is an arithmetic number, because the mean of its divisors is an integer number (94885398).

Almost surely, 2^1257419490 is an apocalyptic number.

1257419490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257419490 is an abundant number, since it is smaller than the sum of its proper divisors (1778913246).

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

1257419490 is a wasteful number, since it uses less digits than its factorization.

1257419490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257314.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1257419490 is about 35460.1112519405. Note that the first 3 decimals coincide. The cubic root of 1257419490 is about 1079.3444495609.

The spelling of 1257419490 in words is "one billion, two hundred fifty-seven million, four hundred nineteen thousand, four hundred ninety".