25407442 has 8 divisors (see below), whose sum is σ = 38156976. Its totient is φ = 12688452.

The previous prime is 25407409. The next prime is 25407449. The reversal of 25407442 is 24470452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25407442.

It is not an unprimeable number, because it can be changed into a prime (25407449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (4769622).

Almost surely, 2^25407442 is an apocalyptic number.

25407442 is a deficient number, since it is larger than the sum of its proper divisors (12749534).

25407442 is a wasteful number, since it uses less digits than its factorization.

25407442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15272.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 25407442 is about 5040.5795301731. The cubic root of 25407442 is about 293.9817117290.

Adding to 25407442 its reverse (24470452), we get a palindrome (49877894).

The spelling of 25407442 in words is "twenty-five million, four hundred seven thousand, four hundred forty-two".