13621376 has 16 divisors (see below), whose sum is σ = 27136590. Its totient is φ = 6810624.

The previous prime is 13621373. The next prime is 13621381. The reversal of 13621376 is 67312631.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 3534400 = 3176^2 + 1880^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (13621373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53081 + ... + 53336.

Almost surely, 2^13621376 is an apocalyptic number.

13621376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13621376 is a deficient number, since it is larger than the sum of its proper divisors (13515214).

13621376 is an equidigital number, since it uses as much as digits as its factorization.

13621376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106431 (or 106419 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 13621376 is about 3690.7148359092. The cubic root of 13621376 is about 238.8216312391.

It can be divided in two parts, 136 and 21376, that added together give a palindrome (21512).

The spelling of 13621376 in words is "thirteen million, six hundred twenty-one thousand, three hundred seventy-six".