25542890 has 8 divisors (see below), whose sum is σ = 45977220. Its totient is φ = 10217152.

The previous prime is 25542883. The next prime is 25542899. The reversal of 25542890 is 9824552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24690961 + 851929 = 4969^2 + 923^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25542890.

It is not an unprimeable number, because it can be changed into a prime (25542899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277135 + ... + 1277154.

Almost surely, 2^25542890 is an apocalyptic number.

25542890 is a deficient number, since it is larger than the sum of its proper divisors (20434330).

25542890 is a wasteful number, since it uses less digits than its factorization.

25542890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554296.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 25542890 is about 5053.9974277793. The cubic root of 25542890 is about 294.5031952173.

The spelling of 25542890 in words is "twenty-five million, five hundred forty-two thousand, eight hundred ninety".