13641556 has 6 divisors (see below), whose sum is σ = 23872730. Its totient is φ = 6820776.

The previous prime is 13641539. The next prime is 13641557. The reversal of 13641556 is 65514631.

13641556 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 13205956 + 435600 = 3634^2 + 660^2 .

It is a super-2 number, since 2×13641556² = 372184100202272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13641557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705191 + ... + 1705198.

Almost surely, 2^13641556 is an apocalyptic number.

It is an amenable number.

13641556 is a deficient number, since it is larger than the sum of its proper divisors (10231174).

13641556 is a wasteful number, since it uses less digits than its factorization.

13641556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410393 (or 3410391 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 13641556 is about 3693.4477118270. The cubic root of 13641556 is about 238.9395107272.

The spelling of 13641556 in words is "thirteen million, six hundred forty-one thousand, five hundred fifty-six".