15314021 has 6 divisors (see below), whose sum is σ = 16009350. Its totient is φ = 14647688.

The previous prime is 15314017. The next prime is 15314029. The reversal of 15314021 is 12041351.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 25921 = 3910^2 + 161^2 .

It is not a de Polignac number, because 15314021 - 2² = 15314017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15314029) 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 5 ways as a sum of consecutive naturals, for example, 13946 + ... + 15003.

It is an arithmetic number, because the mean of its divisors is an integer number (2668225).

Almost surely, 2^15314021 is an apocalyptic number.

It is an amenable number.

15314021 is a deficient number, since it is larger than the sum of its proper divisors (695329).

15314021 is an equidigital number, since it uses as much as digits as its factorization.

15314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28995 (or 28972 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 15314021 is about 3913.3133020498. The cubic root of 15314021 is about 248.3303188179.

Adding to 15314021 its reverse (12041351), we get a palindrome (27355372).

The spelling of 15314021 in words is "fifteen million, three hundred fourteen thousand, twenty-one".