13651121 has 16 divisors (see below), whose sum is σ = 15759360. Its totient is φ = 11703120.

The previous prime is 13651109. The next prime is 13651123. The reversal of 13651121 is 12115631.

13651121 = T₁₀₇₈ + T₁₀₇₉ + ... + T₁₁₀₀.

It is not a de Polignac number, because 13651121 - 2²² = 9456817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13651093 and 13651102.

It is not an unprimeable number, because it can be changed into a prime (13651123) 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, 19646 + ... + 20328.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^13651121 is an apocalyptic number.

13651121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13651121 is a deficient number, since it is larger than the sum of its proper divisors (2108239).

13651121 is a wasteful number, since it uses less digits than its factorization.

13651121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its digits is 180, while the sum is 20.

The square root of 13651121 is about 3694.7423455500. The cubic root of 13651121 is about 238.9953431280.

Adding to 13651121 its reverse (12115631), we get a palindrome (25766752).

The spelling of 13651121 in words is "thirteen million, six hundred fifty-one thousand, one hundred twenty-one".