2400961 has 4 divisors (see below), whose sum is σ = 2542212. Its totient is φ = 2259712.

The previous prime is 2400949. The next prime is 2400971. The reversal of 2400961 is 1690042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1690042 = 2 ⋅845021.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 1311025 = 1044^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400961 - 2⁵ = 2400929 is a prime.

It is a super-2 number, since 2×2400961² = 11529227447042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2400971) 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, 70600 + ... + 70633.

It is an arithmetic number, because the mean of its divisors is an integer number (635553).

2^2400961 is an apocalyptic number.

It is an amenable number.

2400961 is a deficient number, since it is larger than the sum of its proper divisors (141251).

2400961 is a wasteful number, since it uses less digits than its factorization.

2400961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141250.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2400961 is about 1549.5034688570. The cubic root of 2400961 is about 133.9044577725.

The spelling of 2400961 in words is "two million, four hundred thousand, nine hundred sixty-one".