134515131421 has 12 divisors (see below), whose sum is σ = 155637344800. Its totient is φ = 115850350440.

The previous prime is 134515131407. The next prime is 134515131437. The reversal of 134515131421 is 124131515431.

It is a happy number.

It is not a de Polignac number, because 134515131421 - 2¹⁷ = 134515000349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134515131451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29252841 + ... + 29257438.

Almost surely, 2^134515131421 is an apocalyptic number.

134515131421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

134515131421 is a deficient number, since it is larger than the sum of its proper divisors (21122213379).

134515131421 is a wasteful number, since it uses less digits than its factorization.

134515131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58510320 (or 58510309 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

Adding to 134515131421 its reverse (124131515431), we get a palindrome (258646646852).

The spelling of 134515131421 in words is "one hundred thirty-four billion, five hundred fifteen million, one hundred thirty-one thousand, four hundred twenty-one".