1215225001 has 4 divisors (see below), whose sum is σ = 1226582352. Its totient is φ = 1203867652.

The previous prime is 1215224993. The next prime is 1215225007. The reversal of 1215225001 is 1005225121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215225001 - 2³ = 1215224993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215225001.

It is not an unprimeable number, because it can be changed into a prime (1215225007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5678515 + ... + 5678728.

It is an arithmetic number, because the mean of its divisors is an integer number (306645588).

Almost surely, 2^1215225001 is an apocalyptic number.

It is an amenable number.

1215225001 is a deficient number, since it is larger than the sum of its proper divisors (11357351).

1215225001 is a wasteful number, since it uses less digits than its factorization.

1215225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11357350.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1215225001 is about 34860.0774669248. The cubic root of 1215225001 is about 1067.1338559687.

The spelling of 1215225001 in words is "one billion, two hundred fifteen million, two hundred twenty-five thousand, one".