2399961 has 8 divisors (see below), whose sum is σ = 3268224. Its totient is φ = 1565840.

The previous prime is 2399951. The next prime is 2399977. The reversal of 2399961 is 1699932.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2399961 - 2⁶ = 2399897 is a prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (2399911) 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, 8370 + ... + 8651.

It is an arithmetic number, because the mean of its divisors is an integer number (408528).

2^2399961 is an apocalyptic number.

It is an amenable number.

2399961 is a deficient number, since it is larger than the sum of its proper divisors (868263).

2399961 is a wasteful number, since it uses less digits than its factorization.

2399961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17071.

The product of its digits is 26244, while the sum is 39.

The square root of 2399961 is about 1549.1807512360. The cubic root of 2399961 is about 133.8858647935.

The spelling of 2399961 in words is "two million, three hundred ninety-nine thousand, nine hundred sixty-one".