1253665413 has 96 divisors (see below), whose sum is σ = 2497727232. Its totient is φ = 584755200.

The previous prime is 1253665411. The next prime is 1253665417. The reversal of 1253665413 is 3145663521.

1253665413 is a `hidden beast` number, since 1 + 2 + 53 + 66 + 541 + 3 = 666.

It is not a de Polignac number, because 1253665413 - 2¹ = 1253665411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253665411) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 331453 + ... + 335213.

It is an arithmetic number, because the mean of its divisors is an integer number (26017992).

Almost surely, 2^1253665413 is an apocalyptic number.

1253665413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1253665413 is a deficient number, since it is larger than the sum of its proper divisors (1244061819).

1253665413 is a wasteful number, since it uses less digits than its factorization.

1253665413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835 (or 3832 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1253665413 is about 35407.1378820712. The cubic root of 1253665413 is about 1078.2692365765.

It can be divided in two parts, 1253 and 665413, that added together give a palindrome (666666).

The spelling of 1253665413 in words is "one billion, two hundred fifty-three million, six hundred sixty-five thousand, four hundred thirteen".