13420551 has 8 divisors (see below), whose sum is σ = 18471424. Its totient is φ = 8658360.

The previous prime is 13420541. The next prime is 13420573. The reversal of 13420551 is 15502431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13420551 - 2⁶ = 13420487 is a prime.

It is a super-2 number, since 2×13420551² = 360222378287202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72061 + ... + 72246.

It is an arithmetic number, because the mean of its divisors is an integer number (2308928).

Almost surely, 2^13420551 is an apocalyptic number.

13420551 is a deficient number, since it is larger than the sum of its proper divisors (5050873).

13420551 is a wasteful number, since it uses less digits than its factorization.

13420551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144341.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 13420551 is about 3663.4070207936. The cubic root of 13420551 is about 237.6421368942.

Adding to 13420551 its reverse (15502431), we get a palindrome (28922982).

The spelling of 13420551 in words is "thirteen million, four hundred twenty thousand, five hundred fifty-one".