1257013682 has 4 divisors (see below), whose sum is σ = 1885520526. Its totient is φ = 628506840.

The previous prime is 1257013679. The next prime is 1257013727. The reversal of 1257013682 is 2863107521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1250258881 + 6754801 = 35359^2 + 2599^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314253419 + ... + 314253422.

Almost surely, 2^1257013682 is an apocalyptic number.

1257013682 is a deficient number, since it is larger than the sum of its proper divisors (628506844).

1257013682 is an equidigital number, since it uses as much as digits as its factorization.

1257013682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628506843.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1257013682 is about 35454.3887551316. The cubic root of 1257013682 is about 1079.2283245011.

The spelling of 1257013682 in words is "one billion, two hundred fifty-seven million, thirteen thousand, six hundred eighty-two".