15400641 has 8 divisors (see below), whose sum is σ = 20670784. Its totient is φ = 10198800.

The previous prime is 15400613. The next prime is 15400643. The reversal of 15400641 is 14600451.

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

It is not a de Polignac number, because 15400641 - 2¹⁹ = 14876353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15400643) 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, 16546 + ... + 17451.

It is an arithmetic number, because the mean of its divisors is an integer number (2583848).

Almost surely, 2^15400641 is an apocalyptic number.

It is an amenable number.

15400641 is a deficient number, since it is larger than the sum of its proper divisors (5270143).

15400641 is a wasteful number, since it uses less digits than its factorization.

15400641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34151.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 15400641 is about 3924.3650441823. The cubic root of 15400641 is about 248.7976453098.

The spelling of 15400641 in words is "fifteen million, four hundred thousand, six hundred forty-one".