137521772 has 24 divisors (see below), whose sum is σ = 268233840. Its totient is φ = 61309440.

The previous prime is 137521763. The next prime is 137521781. The reversal of 137521772 is 277125731.

It is an interprime number because it is at equal distance from previous prime (137521763) and next prime (137521781).

It is a super-3 number, since 3×137521772³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51929 + ... + 54512.

It is an arithmetic number, because the mean of its divisors is an integer number (11176410).

Almost surely, 2^137521772 is an apocalyptic number.

It is an amenable number.

137521772 is a deficient number, since it is larger than the sum of its proper divisors (130712068).

137521772 is a wasteful number, since it uses less digits than its factorization.

137521772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106481 (or 106479 counting only the distinct ones).

The product of its digits is 20580, while the sum is 35.

The square root of 137521772 is about 11726.9677240112. The cubic root of 137521772 is about 516.1672984755.

The spelling of 137521772 in words is "one hundred thirty-seven million, five hundred twenty-one thousand, seven hundred seventy-two".