1253652921 has 12 divisors (see below), whose sum is σ = 1811406948. Its totient is φ = 835503264.

The previous prime is 1253652899. The next prime is 1253652979. The reversal of 1253652921 is 1292563521.

It is a happy number.

1253652921 is a `hidden beast` number, since 1 + 2 + 5 + 365 + 292 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1230957225 + 22695696 = 35085^2 + 4764^2 .

It is not a de Polignac number, because 1253652921 - 2⁷ = 1253652793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253652221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10311 + ... + 51123.

It is an arithmetic number, because the mean of its divisors is an integer number (150950579).

Almost surely, 2^1253652921 is an apocalyptic number.

It is an amenable number.

1253652921 is a deficient number, since it is larger than the sum of its proper divisors (557754027).

1253652921 is a wasteful number, since it uses less digits than its factorization.

1253652921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44232 (or 44229 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1253652921 is about 35406.9614765232. The cubic root of 1253652921 is about 1078.2656551360.

The spelling of 1253652921 in words is "one billion, two hundred fifty-three million, six hundred fifty-two thousand, nine hundred twenty-one".