2399401 has 3 divisors (see below), whose sum is σ = 2400951. Its totient is φ = 2397852.

The previous prime is 2399399. The next prime is 2399407. The reversal of 2399401 is 1049932.

It is a happy number.

The square root of 2399401 is 1549.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 811801 + 1587600 = 901^2 + 1260^2 .

It is not a de Polignac number, because 2399401 - 2¹ = 2399399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2399401.

It is not an unprimeable number, because it can be changed into a prime (2399407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 775 + ... + 2323.

It is an arithmetic number, because the mean of its divisors is an integer number (800317).

2^2399401 is an apocalyptic number.

2399401 is the 1549-th square number.

2399401 is the 775-th centered octagonal number.

It is an amenable number.

2399401 is a deficient number, since it is larger than the sum of its proper divisors (1550).

2399401 is an frugal number, since it uses more digits than its factorization.

2399401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098 (or 1549 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The cubic root of 2399401 is about 133.8754504692.

The spelling of 2399401 in words is "two million, three hundred ninety-nine thousand, four hundred one".