1535121252 has 36 divisors (see below), whose sum is σ = 4434795456. Its totient is φ = 438606000.

The previous prime is 1535121239. The next prime is 1535121253. The reversal of 1535121252 is 2521215351.

1535121252 is a `hidden beast` number, since 1 + 535 + 1 + 2 + 125 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1535121253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3045624 + ... + 3046127.

Almost surely, 2^1535121252 is an apocalyptic number.

1535121252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1535121252 is an abundant number, since it is smaller than the sum of its proper divisors (2899674204).

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

1535121252 is a wasteful number, since it uses less digits than its factorization.

1535121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091768 (or 6091763 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1535121252 is about 39180.6234253617. The cubic root of 1535121252 is about 1153.5795840773.

The spelling of 1535121252 in words is "one billion, five hundred thirty-five million, one hundred twenty-one thousand, two hundred fifty-two".