25000002 has 20 divisors (see below), whose sum is σ = 56018886. Its totient is φ = 8333280.

The previous prime is 24999983. The next prime is 25000009. The reversal of 25000002 is 20000052.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 408321 = 4959^2 + 639^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (25000009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76999 + ... + 77322.

Almost surely, 2^25000002 is an apocalyptic number.

25000002 is an abundant number, since it is smaller than the sum of its proper divisors (31018884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25000002 is a wasteful number, since it uses less digits than its factorization.

25000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154335 (or 154326 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 25000002 is about 5000.0002000000. Note that the first 3 decimals coincide. The cubic root of 25000002 is about 292.4017816187.

Adding to 25000002 its reverse (20000052), we get a palindrome (45000054).

The spelling of 25000002 in words is "twenty-five million, two", and thus it is an aban number and an uban number.