25217542 has 16 divisors (see below), whose sum is σ = 44285472. Its totient is φ = 10543680.

The previous prime is 25217537. The next prime is 25217557. The reversal of 25217542 is 24571252.

It is a self number, because there is not a number n which added to its sum of digits gives 25217542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21393 + ... + 22540.

It is an arithmetic number, because the mean of its divisors is an integer number (2767842).

Almost surely, 2^25217542 is an apocalyptic number.

25217542 is a deficient number, since it is larger than the sum of its proper divisors (19067930).

25217542 is a wasteful number, since it uses less digits than its factorization.

25217542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43983.

The product of its digits is 5600, while the sum is 28.

The square root of 25217542 is about 5021.7070802666. The cubic root of 25217542 is about 293.2474544856.

Adding to 25217542 its reverse (24571252), we get a palindrome (49788794).

The spelling of 25217542 in words is "twenty-five million, two hundred seventeen thousand, five hundred forty-two".