25121542 has 4 divisors (see below), whose sum is σ = 37682316. Its totient is φ = 12560770.

The previous prime is 25121539. The next prime is 25121581. The reversal of 25121542 is 24512152.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6280384 + ... + 6280387.

It is an arithmetic number, because the mean of its divisors is an integer number (9420579).

Almost surely, 2^25121542 is an apocalyptic number.

25121542 is a deficient number, since it is larger than the sum of its proper divisors (12560774).

25121542 is a wasteful number, since it uses less digits than its factorization.

25121542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12560773.

The product of its digits is 800, while the sum is 22.

The square root of 25121542 is about 5012.1394633430. The cubic root of 25121542 is about 292.8748625974.

Adding to 25121542 its reverse (24512152), we get a palindrome (49633694).

The spelling of 25121542 in words is "twenty-five million, one hundred twenty-one thousand, five hundred forty-two".