137421171261 has 24 divisors (see below), whose sum is σ = 216616589280. Its totient is φ = 83257044000.

The previous prime is 137421171247. The next prime is 137421171281. The reversal of 137421171261 is 162171124731.

137421171261 is a `hidden beast` number, since 1 + 3 + 7 + 421 + 171 + 2 + 61 = 666.

It is not a de Polignac number, because 137421171261 - 2⁶ = 137421171197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137421171221) 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, 54811 + ... + 527111.

It is an arithmetic number, because the mean of its divisors is an integer number (9025691220).

Almost surely, 2^137421171261 is an apocalyptic number.

137421171261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137421171261 is a deficient number, since it is larger than the sum of its proper divisors (79195418019).

137421171261 is a wasteful number, since it uses less digits than its factorization.

137421171261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475257 (or 475254 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

Adding to 137421171261 its reverse (162171124731), we get a palindrome (299592295992).

The spelling of 137421171261 in words is "one hundred thirty-seven billion, four hundred twenty-one million, one hundred seventy-one thousand, two hundred sixty-one".