1253651216 has 10 divisors (see below), whose sum is σ = 2428949262. Its totient is φ = 626825600.

The previous prime is 1253651209. The next prime is 1253651227. The reversal of 1253651216 is 6121563521.

It can be written as a sum of positive squares in only one way, i.e., 1252876816 + 774400 = 35396^2 + 880^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39176585 + ... + 39176616.

Almost surely, 2^1253651216 is an apocalyptic number.

1253651216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1253651216 is a deficient number, since it is larger than the sum of its proper divisors (1175298046).

1253651216 is an equidigital number, since it uses as much as digits as its factorization.

1253651216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78353209 (or 78353203 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 1253651216 is about 35406.9373993290. The cubic root of 1253651216 is about 1078.2651663129.

The spelling of 1253651216 in words is "one billion, two hundred fifty-three million, six hundred fifty-one thousand, two hundred sixteen".