84139252 has 18 divisors (see below), whose sum is σ = 149723574. Its totient is φ = 41372640.

The previous prime is 84139217. The next prime is 84139271. The reversal of 84139252 is 25293148.

It can be written as a sum of positive squares in 3 ways, for example, as 306916 + 83832336 = 554^2 + 9156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12058 + ... + 17710.

Almost surely, 2^84139252 is an apocalyptic number.

It is an amenable number.

84139252 is a deficient number, since it is larger than the sum of its proper divisors (65584322).

84139252 is a wasteful number, since it uses less digits than its factorization.

84139252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779 (or 5716 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 84139252 is about 9172.7450635020. The cubic root of 84139252 is about 438.1937870484.

The spelling of 84139252 in words is "eighty-four million, one hundred thirty-nine thousand, two hundred fifty-two".