137421501 has 16 divisors (see below), whose sum is σ = 209568384. Its totient is φ = 78465024.

The previous prime is 137421499. The next prime is 137421503. The reversal of 137421501 is 105124731.

It is an interprime number because it is at equal distance from previous prime (137421499) and next prime (137421503).

It is not a de Polignac number, because 137421501 - 2¹ = 137421499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137421503) 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 15 ways as a sum of consecutive naturals, for example, 48541 + ... + 51293.

It is an arithmetic number, because the mean of its divisors is an integer number (13098024).

Almost surely, 2^137421501 is an apocalyptic number.

It is an amenable number.

137421501 is a deficient number, since it is larger than the sum of its proper divisors (72146883).

137421501 is a wasteful number, since it uses less digits than its factorization.

137421501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 137421501 is about 11722.6917130836. The cubic root of 137421501 is about 516.0418172648.

The spelling of 137421501 in words is "one hundred thirty-seven million, four hundred twenty-one thousand, five hundred one".