139977252 has 72 divisors (see below), whose sum is σ = 376320672. Its totient is φ = 43718400.

The previous prime is 139977251. The next prime is 139977283. The reversal of 139977252 is 252779931.

139977252 is a `hidden beast` number, since 1 + 399 + 7 + 7 + 252 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 139977198 and 139977207.

It is not an unprimeable number, because it can be changed into a prime (139977251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202227 + ... + 202917.

It is an arithmetic number, because the mean of its divisors is an integer number (5226676).

Almost surely, 2^139977252 is an apocalyptic number.

139977252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139977252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188160336).

139977252 is an abundant number, since it is smaller than the sum of its proper divisors (236343420).

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

139977252 is a wasteful number, since it uses less digits than its factorization.

139977252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1044 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 139977252 is about 11831.1982486982. The cubic root of 139977252 is about 519.2212851246.

The spelling of 139977252 in words is "one hundred thirty-nine million, nine hundred seventy-seven thousand, two hundred fifty-two".