1257520474 has 16 divisors (see below), whose sum is σ = 2157465600. Its totient is φ = 538508304.

The previous prime is 1257520463. The next prime is 1257520489. The reversal of 1257520474 is 4740257521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17209 + ... + 53020.

It is an arithmetic number, because the mean of its divisors is an integer number (134841600).

Almost surely, 2^1257520474 is an apocalyptic number.

1257520474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1257520474 is a deficient number, since it is larger than the sum of its proper divisors (899945126).

1257520474 is a wasteful number, since it uses less digits than its factorization.

1257520474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71517.

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 1257520474 is about 35461.5351331552. The cubic root of 1257520474 is about 1079.3733430217.

Adding to 1257520474 its reverse (4740257521), we get a palindrome (5997777995).

It can be divided in two parts, 1257 and 520474, that added together give a triangular number (521731 = T₁₀₂₁).

The spelling of 1257520474 in words is "one billion, two hundred fifty-seven million, five hundred twenty thousand, four hundred seventy-four".