1253638250 has 16 divisors (see below), whose sum is σ = 2346811272. Its totient is φ = 501455200.

The previous prime is 1253638219. The next prime is 1253638277. The reversal of 1253638250 is 528363521.

It can be written as a sum of positive squares in 4 ways, for example, as 56685841 + 1196952409 = 7529^2 + 34597^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1253638250.

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, 2507027 + ... + 2507526.

Almost surely, 2^1253638250 is an apocalyptic number.

1253638250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253638250 is a deficient number, since it is larger than the sum of its proper divisors (1093173022).

1253638250 is an equidigital number, since it uses as much as digits as its factorization.

1253638250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014570 (or 5014560 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1253638250 is about 35406.7542991447. The cubic root of 1253638250 is about 1078.2614489487.

The spelling of 1253638250 in words is "one billion, two hundred fifty-three million, six hundred thirty-eight thousand, two hundred fifty".