137511421 has 4 divisors (see below), whose sum is σ = 138515292. Its totient is φ = 136507552.

The previous prime is 137511401. The next prime is 137511427. The reversal of 137511421 is 124115731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91948921 + 45562500 = 9589^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 137511421 - 2¹¹ = 137509373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137511427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501730 + ... + 502003.

It is an arithmetic number, because the mean of its divisors is an integer number (34628823).

Almost surely, 2^137511421 is an apocalyptic number.

It is an amenable number.

137511421 is a deficient number, since it is larger than the sum of its proper divisors (1003871).

137511421 is a wasteful number, since it uses less digits than its factorization.

137511421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003870.

The product of its digits is 840, while the sum is 25.

The square root of 137511421 is about 11726.5263825227. The cubic root of 137511421 is about 516.1543478431.

The spelling of 137511421 in words is "one hundred thirty-seven million, five hundred eleven thousand, four hundred twenty-one".