1215948825 has 72 divisors (see below), whose sum is σ = 2680536768. Its totient is φ = 513095040.

The previous prime is 1215948823. The next prime is 1215948863. The reversal of 1215948825 is 5288495121.

1215948825 is a `hidden beast` number, since 12 + 159 + 488 + 2 + 5 = 666.

It is not a de Polignac number, because 1215948825 - 2¹ = 1215948823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1215948823) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9219 + ... + 50168.

Almost surely, 2^1215948825 is an apocalyptic number.

1215948825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215948825 is an abundant number, since it is smaller than the sum of its proper divisors (1464587943).

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

1215948825 is a wasteful number, since it uses less digits than its factorization.

1215948825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59423 (or 59415 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 1215948825 is about 34870.4577687188. The cubic root of 1215948825 is about 1067.3456860929.

The spelling of 1215948825 in words is "one billion, two hundred fifteen million, nine hundred forty-eight thousand, eight hundred twenty-five".