135476621 has 24 divisors (see below), whose sum is σ = 168592320. Its totient is φ = 108162432.

The previous prime is 135476609. The next prime is 135476633. The reversal of 135476621 is 126674531.

It is an interprime number because it is at equal distance from previous prime (135476609) and next prime (135476633).

It is not a de Polignac number, because 135476621 - 2⁶ = 135476557 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 (135476651) 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, 85010 + ... + 86588.

It is an arithmetic number, because the mean of its divisors is an integer number (7024680).

Almost surely, 2^135476621 is an apocalyptic number.

It is an amenable number.

135476621 is a deficient number, since it is larger than the sum of its proper divisors (33115699).

135476621 is a wasteful number, since it uses less digits than its factorization.

135476621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1706 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 135476621 is about 11639.4424694656. The cubic root of 135476621 is about 513.5957863615.

The spelling of 135476621 in words is "one hundred thirty-five million, four hundred seventy-six thousand, six hundred twenty-one".