15945401 has 4 divisors (see below), whose sum is σ = 15956112. Its totient is φ = 15934692.

The previous prime is 15945383. The next prime is 15945437. The reversal of 15945401 is 10454951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15945401 - 2¹⁰ = 15944377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15945491) 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, 2675 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (3989028).

Almost surely, 2^15945401 is an apocalyptic number.

It is an amenable number.

15945401 is a deficient number, since it is larger than the sum of its proper divisors (10711).

15945401 is an equidigital number, since it uses as much as digits as its factorization.

15945401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 15945401 is about 3993.1692926797. The cubic root of 15945401 is about 251.6972565383.

The spelling of 15945401 in words is "fifteen million, nine hundred forty-five thousand, four hundred one".