13577421 has 16 divisors (see below), whose sum is σ = 21268800. Its totient is φ = 7595520.

The previous prime is 13577413. The next prime is 13577449. The reversal of 13577421 is 12477531.

It is not a de Polignac number, because 13577421 - 2³ = 13577413 is a prime.

It is a super-2 number, since 2×13577421² = 368692722022482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13577471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15396 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (1329300).

Almost surely, 2^13577421 is an apocalyptic number.

13577421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13577421 is a deficient number, since it is larger than the sum of its proper divisors (7691379).

13577421 is a wasteful number, since it uses less digits than its factorization.

13577421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31676.

The product of its digits is 5880, while the sum is 30.

The square root of 13577421 is about 3684.7552157504. The cubic root of 13577421 is about 238.5644688571.

It can be divided in two parts, 1357 and 7421, that added together give a palindrome (8778).

The spelling of 13577421 in words is "thirteen million, five hundred seventy-seven thousand, four hundred twenty-one".