15690945 has 16 divisors (see below), whose sum is σ = 26197632. Its totient is φ = 8004480.

The previous prime is 15690911. The next prime is 15690971. The reversal of 15690945 is 54909651.

It is not a de Polignac number, because 15690945 - 2¹² = 15686849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22396 + ... + 23085.

It is an arithmetic number, because the mean of its divisors is an integer number (1637352).

Almost surely, 2^15690945 is an apocalyptic number.

15690945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15690945 is a deficient number, since it is larger than the sum of its proper divisors (10506687).

15690945 is a wasteful number, since it uses less digits than its factorization.

15690945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45512.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 15690945 is about 3961.1797485093. The cubic root of 15690945 is about 250.3512130332.

The spelling of 15690945 in words is "fifteen million, six hundred ninety thousand, nine hundred forty-five".