13420690 has 8 divisors (see below), whose sum is σ = 24157260. Its totient is φ = 5368272.

The previous prime is 13420663. The next prime is 13420691. The reversal of 13420690 is 9602431.

It can be written as a sum of positive squares in 2 ways, for example, as 12341169 + 1079521 = 3513^2 + 1039^2 .

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

It is a super-2 number, since 2×13420690² = 360229840152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13420691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671025 + ... + 671044.

Almost surely, 2^13420690 is an apocalyptic number.

13420690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13420690 is a deficient number, since it is larger than the sum of its proper divisors (10736570).

13420690 is a wasteful number, since it uses less digits than its factorization.

13420690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342076.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13420690 is about 3663.4259921554. The cubic root of 13420690 is about 237.6429573310.

The spelling of 13420690 in words is "thirteen million, four hundred twenty thousand, six hundred ninety".