13120551 has 12 divisors (see below), whose sum is σ = 19263400. Its totient is φ = 8603280.

The previous prime is 13120537. The next prime is 13120553. The reversal of 13120551 is 15502131.

It is not a de Polignac number, because 13120551 - 2⁶ = 13120487 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 (13120553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11401 + ... + 12498.

Almost surely, 2^13120551 is an apocalyptic number.

13120551 is a deficient number, since it is larger than the sum of its proper divisors (6142849).

13120551 is a wasteful number, since it uses less digits than its factorization.

13120551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23966 (or 23963 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 13120551 is about 3622.2301141700. The cubic root of 13120551 is about 235.8580432793.

Adding to 13120551 its reverse (15502131), we get a palindrome (28622682).

The spelling of 13120551 in words is "thirteen million, one hundred twenty thousand, five hundred fifty-one".