1253657330 has 16 divisors (see below), whose sum is σ = 2257378200. Its totient is φ = 501286272.

The previous prime is 1253657323. The next prime is 1253657351. The reversal of 1253657330 is 337563521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 863713321 + 389944009 = 29389^2 + 19747^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9932 + ... + 51048.

Almost surely, 2^1253657330 is an apocalyptic number.

1253657330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253657330 is a deficient number, since it is larger than the sum of its proper divisors (1003720870).

1253657330 is a wasteful number, since it uses less digits than its factorization.

1253657330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44173.

The product of its (nonzero) digits is 56700, while the sum is 35.

The square root of 1253657330 is about 35407.0237382359. The cubic root of 1253657330 is about 1078.2669191934.

The spelling of 1253657330 in words is "one billion, two hundred fifty-three million, six hundred fifty-seven thousand, three hundred thirty".