1215272453 has 8 divisors (see below), whose sum is σ = 1226036736. Its totient is φ = 1204554400.

The previous prime is 1215272449. The next prime is 1215272477. The reversal of 1215272453 is 3542725121.

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

It is a cyclic number.

It is not a de Polignac number, because 1215272453 - 2² = 1215272449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215272953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42350 + ... + 64992.

It is an arithmetic number, because the mean of its divisors is an integer number (153254592).

Almost surely, 2^1215272453 is an apocalyptic number.

It is an amenable number.

1215272453 is a deficient number, since it is larger than the sum of its proper divisors (10764283).

1215272453 is a wasteful number, since it uses less digits than its factorization.

1215272453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23115.

The product of its digits is 16800, while the sum is 32.

The square root of 1215272453 is about 34860.7580669153. The cubic root of 1215272453 is about 1067.1477455712.

Adding to 1215272453 its reverse (3542725121), we get a palindrome (4757997574).

The spelling of 1215272453 in words is "one billion, two hundred fifteen million, two hundred seventy-two thousand, four hundred fifty-three".