16365401 has 4 divisors (see below), whose sum is σ = 17624292. Its totient is φ = 15106512.

The previous prime is 16365389. The next prime is 16365421. The reversal of 16365401 is 10456361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8094025 + 8271376 = 2845^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 16365401 - 2⁶ = 16365337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16365421) 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, 629426 + ... + 629451.

It is an arithmetic number, because the mean of its divisors is an integer number (4406073).

Almost surely, 2^16365401 is an apocalyptic number.

It is an amenable number.

16365401 is a deficient number, since it is larger than the sum of its proper divisors (1258891).

16365401 is a wasteful number, since it uses less digits than its factorization.

16365401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258890.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16365401 is about 4045.4172837916. The cubic root of 16365401 is about 253.8880249195. Note that the first 3 decimals are identical.

The spelling of 16365401 in words is "sixteen million, three hundred sixty-five thousand, four hundred one".