1215642150 has 36 divisors (see below), whose sum is σ = 3266026452. Its totient is φ = 324171120.

The previous prime is 1215642133. The next prime is 1215642157. The reversal of 1215642150 is 512465121.

1215642150 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 642 + 15 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215642157) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1350264 + ... + 1351163.

It is an arithmetic number, because the mean of its divisors is an integer number (90722957).

Almost surely, 2^1215642150 is an apocalyptic number.

1215642150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215642150 is an abundant number, since it is smaller than the sum of its proper divisors (2050384302).

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

1215642150 is a wasteful number, since it uses less digits than its factorization.

1215642150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701445 (or 2701437 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1215642150 is about 34866.0601445016. The cubic root of 1215642150 is about 1067.2559466363.

The spelling of 1215642150 in words is "one billion, two hundred fifteen million, six hundred forty-two thousand, one hundred fifty".