2581402 has 8 divisors (see below), whose sum is σ = 3902976. Its totient is φ = 1280412.

The previous prime is 2581393. The next prime is 2581409. The reversal of 2581402 is 2041852.

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

It is not an unprimeable number, because it can be changed into a prime (2581409) 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, 4828 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (487872).

2^2581402 is an apocalyptic number.

2581402 is a deficient number, since it is larger than the sum of its proper divisors (1321574).

2581402 is a wasteful number, since it uses less digits than its factorization.

2581402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2581402 is about 1606.6742046849. The cubic root of 2581402 is about 137.1782360568.

The spelling of 2581402 in words is "two million, five hundred eighty-one thousand, four hundred two".