25422015 has 32 divisors (see below), whose sum is σ = 43831296. Its totient is φ = 12545280.

The previous prime is 25422013. The next prime is 25422029. The reversal of 25422015 is 51022452.

It is a happy number.

25422015 is a nontrivial binomial coefficient, being equal to C(7131, 2).

It is not a de Polignac number, because 25422015 - 2¹ = 25422013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25421982 and 25422000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9507 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (1369728).

Almost surely, 2^25422015 is an apocalyptic number.

25422015 is the 7130-th triangular number.

25422015 is a deficient number, since it is larger than the sum of its proper divisors (18409281).

25422015 is a wasteful number, since it uses less digits than its factorization.

25422015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25422015 is about 5042.0248908549. The cubic root of 25422015 is about 294.0379075560.

Adding to 25422015 its reverse (51022452), we get a palindrome (76444467).

The spelling of 25422015 in words is "twenty-five million, four hundred twenty-two thousand, fifteen".