1257142288 has 10 divisors (see below), whose sum is σ = 2435713214. Its totient is φ = 628571136.

The previous prime is 1257142241. The next prime is 1257142291. The reversal of 1257142288 is 8822417521.

It can be written as a sum of positive squares in only one way, i.e., 950612224 + 306530064 = 30832^2 + 17508^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1257142288.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285681 + ... + 39285712.

Almost surely, 2^1257142288 is an apocalyptic number.

It is an amenable number.

1257142288 is a deficient number, since it is larger than the sum of its proper divisors (1178570926).

1257142288 is an equidigital number, since it uses as much as digits as its factorization.

1257142288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78571401 (or 78571395 counting only the distinct ones).

The product of its digits is 71680, while the sum is 40.

The square root of 1257142288 is about 35456.2023911191. The cubic root of 1257142288 is about 1079.2651287955.

The spelling of 1257142288 in words is "one billion, two hundred fifty-seven million, one hundred forty-two thousand, two hundred eighty-eight".