1521786132 has 36 divisors (see below), whose sum is σ = 3850018900. Its totient is φ = 506829312.

The previous prime is 1521786131. The next prime is 1521786139. The reversal of 1521786132 is 2316871251.

1521786132 is a `hidden beast` number, since 1 + 521 + 78 + 61 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53670276 + 1468115856 = 7326^2 + 38316^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521786131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26244 + ... + 61092.

Almost surely, 2^1521786132 is an apocalyptic number.

1521786132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1521786132 is an abundant number, since it is smaller than the sum of its proper divisors (2328232768).

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

1521786132 is a wasteful number, since it uses less digits than its factorization.

1521786132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36072 (or 36067 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1521786132 is about 39010.0773134327. The cubic root of 1521786132 is about 1150.2296030529.

The spelling of 1521786132 in words is "one billion, five hundred twenty-one million, seven hundred eighty-six thousand, one hundred thirty-two".