1253066391 has 24 divisors (see below), whose sum is σ = 1823380416. Its totient is φ = 829221120.

The previous prime is 1253066377. The next prime is 1253066401. The reversal of 1253066391 is 1936603521.

1253066391 is a `hidden beast` number, since 12 + 5 + 3 + 0 + 6 + 639 + 1 = 666.

It is not a de Polignac number, because 1253066391 - 2⁷ = 1253066263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253066351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 790786 + ... + 792368.

It is an arithmetic number, because the mean of its divisors is an integer number (75974184).

Almost surely, 2^1253066391 is an apocalyptic number.

1253066391 is a deficient number, since it is larger than the sum of its proper divisors (570314025).

1253066391 is a wasteful number, since it uses less digits than its factorization.

1253066391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183 (or 2180 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 1253066391 is about 35398.6778142913. The cubic root of 1253066391 is about 1078.0974709442.

The spelling of 1253066391 in words is "one billion, two hundred fifty-three million, sixty-six thousand, three hundred ninety-one".