1215145560 has 32 divisors (see below), whose sum is σ = 3645437040. Its totient is φ = 324038784.

The previous prime is 1215145537. The next prime is 1215145583. The reversal of 1215145560 is 655415121.

It is an interprime number because it is at equal distance from previous prime (1215145537) and next prime (1215145583).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5062987 + ... + 5063226.

Almost surely, 2^1215145560 is an apocalyptic number.

1215145560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215145560 is an abundant number, since it is smaller than the sum of its proper divisors (2430291480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215145560 is a wasteful number, since it uses less digits than its factorization.

1215145560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126227 (or 10126223 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1215145560 is about 34858.9380216896. The cubic root of 1215145560 is about 1067.1106021055.

The spelling of 1215145560 in words is "one billion, two hundred fifteen million, one hundred forty-five thousand, five hundred sixty".