2402781 has 8 divisors (see below), whose sum is σ = 3272064. Its totient is φ = 1567680.

The previous prime is 2402773. The next prime is 2402789. The reversal of 2402781 is 1872042.

It is an interprime number because it is at equal distance from previous prime (2402773) and next prime (2402789).

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

It is not a de Polignac number, because 2402781 - 2³ = 2402773 is a prime.

It is a super-2 number, since 2×2402781² = 11546713067922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2402789) 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, 8380 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (409008).

2^2402781 is an apocalyptic number.

It is an amenable number.

2402781 is a deficient number, since it is larger than the sum of its proper divisors (869283).

2402781 is a wasteful number, since it uses less digits than its factorization.

2402781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17091.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2402781 is about 1550.0906425109. The cubic root of 2402781 is about 133.9382837503.

The spelling of 2402781 in words is "two million, four hundred two thousand, seven hundred eighty-one".