13515890 has 8 divisors (see below), whose sum is σ = 24328620. Its totient is φ = 5406352.

The previous prime is 13515869. The next prime is 13515893. The reversal of 13515890 is 9851531.

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 1771561 = 3427^2 + 1331^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13515893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675785 + ... + 675804.

Almost surely, 2^13515890 is an apocalyptic number.

13515890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13515890 is a deficient number, since it is larger than the sum of its proper divisors (10812730).

13515890 is a wasteful number, since it uses less digits than its factorization.

13515890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351596.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 13515890 is about 3676.3963333678. The cubic root of 13515890 is about 238.2035426572.

The spelling of 13515890 in words is "thirteen million, five hundred fifteen thousand, eight hundred ninety".