1642518252 has 36 divisors (see below), whose sum is σ = 4173676416. Its totient is φ = 544637280.

The previous prime is 1642518221. The next prime is 1642518253. The reversal of 1642518252 is 2528152461.

1642518252 is a `hidden beast` number, since 1 + 6 + 425 + 182 + 52 = 666.

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 not an unprimeable number, because it can be changed into a prime (1642518253) 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, 112563 + ... + 126314.

It is an arithmetic number, because the mean of its divisors is an integer number (115935456).

Almost surely, 2^1642518252 is an apocalyptic number.

1642518252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642518252 is an abundant number, since it is smaller than the sum of its proper divisors (2531158164).

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

1642518252 is a wasteful number, since it uses less digits than its factorization.

1642518252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239078 (or 239073 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 1642518252 is about 40527.9934366359. The cubic root of 1642518252 is about 1179.8769985742.

The spelling of 1642518252 in words is "one billion, six hundred forty-two million, five hundred eighteen thousand, two hundred fifty-two".