25420402 has 16 divisors (see below), whose sum is σ = 44029440. Its totient is φ = 10781568.

The previous prime is 25420399. The next prime is 25420411. The reversal of 25420402 is 20402452.

It is a self number, because there is not a number n which added to its sum of digits gives 25420402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8002 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^25420402 is an apocalyptic number.

25420402 is a deficient number, since it is larger than the sum of its proper divisors (18609038).

25420402 is a wasteful number, since it uses less digits than its factorization.

25420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25420402 is about 5041.8649327407. The cubic root of 25420402 is about 294.0316886262.

Adding to 25420402 its reverse (20402452), we get a palindrome (45822854).

The spelling of 25420402 in words is "twenty-five million, four hundred twenty thousand, four hundred two".