25143442 has 8 divisors (see below), whose sum is σ = 39933756. Its totient is φ = 11832192.

The previous prime is 25143427. The next prime is 25143487. The reversal of 25143442 is 24434152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25090081 + 53361 = 5009^2 + 231^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369723 + ... + 369790.

Almost surely, 2^25143442 is an apocalyptic number.

25143442 is a deficient number, since it is larger than the sum of its proper divisors (14790314).

25143442 is a wasteful number, since it uses less digits than its factorization.

25143442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739532.

The product of its digits is 3840, while the sum is 25.

The square root of 25143442 is about 5014.3236832099. The cubic root of 25143442 is about 292.9599435819.

Adding to 25143442 its reverse (24434152), we get a palindrome (49577594).

The spelling of 25143442 in words is "twenty-five million, one hundred forty-three thousand, four hundred forty-two".