1215957253 has 8 divisors (see below), whose sum is σ = 1395735680. Its totient is φ = 1037696400.

The previous prime is 1215957241. The next prime is 1215957271. The reversal of 1215957253 is 3527595121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215957253 is a prime.

It is a super-2 number, since 2×1215957253² = 2957104082246612018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215957293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377673 + ... + 380878.

It is an arithmetic number, because the mean of its divisors is an integer number (174466960).

Almost surely, 2^1215957253 is an apocalyptic number.

It is an amenable number.

1215957253 is a deficient number, since it is larger than the sum of its proper divisors (179778427).

1215957253 is an equidigital number, since it uses as much as digits as its factorization.

1215957253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758787.

The product of its digits is 94500, while the sum is 40.

The square root of 1215957253 is about 34870.5786157901. The cubic root of 1215957253 is about 1067.3481520873.

The spelling of 1215957253 in words is "one billion, two hundred fifteen million, nine hundred fifty-seven thousand, two hundred fifty-three".