25145442 has 24 divisors (see below), whose sum is σ = 62265216. Its totient is φ = 7184376.

The previous prime is 25145401. The next prime is 25145443. The reversal of 25145442 is 24454152.

It is not an unprimeable number, because it can be changed into a prime (25145443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99658 + ... + 99909.

It is an arithmetic number, because the mean of its divisors is an integer number (2594384).

Almost surely, 2^25145442 is an apocalyptic number.

25145442 is an abundant number, since it is smaller than the sum of its proper divisors (37119774).

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

25145442 is a wasteful number, since it uses less digits than its factorization.

25145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199582 (or 199579 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 25145442 is about 5014.5231079336. The cubic root of 25145442 is about 292.9677110726.

Adding to 25145442 its reverse (24454152), we get a palindrome (49599594).

The spelling of 25145442 in words is "twenty-five million, one hundred forty-five thousand, four hundred forty-two".