137421252 has 48 divisors (see below), whose sum is σ = 357302400. Its totient is φ = 45675360.

The previous prime is 137421247. The next prime is 137421283. The reversal of 137421252 is 252124731.

It is a super-3 number, since 3×137421252³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40377 + ... + 43647.

It is an arithmetic number, because the mean of its divisors is an integer number (7443800).

Almost surely, 2^137421252 is an apocalyptic number.

137421252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

137421252 is an abundant number, since it is smaller than the sum of its proper divisors (219881148).

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

137421252 is a wasteful number, since it uses less digits than its factorization.

137421252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673 (or 3665 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 137421252 is about 11722.6810926511. The cubic root of 137421252 is about 516.0415055851.

Adding to 137421252 its reverse (252124731), we get a palindrome (389545983).

The spelling of 137421252 in words is "one hundred thirty-seven million, four hundred twenty-one thousand, two hundred fifty-two".