25006402 has 4 divisors (see below), whose sum is σ = 37509606. Its totient is φ = 12503200.

The previous prime is 25006391. The next prime is 25006409. The reversal of 25006402 is 20460052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 116281 = 4989^2 + 341^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25006402.

It is not an unprimeable number, because it can be changed into a prime (25006409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251599 + ... + 6251602.

Almost surely, 2^25006402 is an apocalyptic number.

25006402 is a deficient number, since it is larger than the sum of its proper divisors (12503204).

25006402 is a wasteful number, since it uses less digits than its factorization.

25006402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12503203.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 25006402 is about 5000.6401590196. The cubic root of 25006402 is about 292.4267311065.

Adding to 25006402 its reverse (20460052), we get a palindrome (45466454).

The spelling of 25006402 in words is "twenty-five million, six thousand, four hundred two".