25442420 has 24 divisors (see below), whose sum is σ = 53610984. Its totient is φ = 10142336.

The previous prime is 25442419. The next prime is 25442423. The reversal of 25442420 is 2424452.

It can be written as a sum of positive squares in 4 ways, for example, as 1373584 + 24068836 = 1172^2 + 4906^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4334 + ... + 8346.

It is an arithmetic number, because the mean of its divisors is an integer number (2233791).

Almost surely, 2^25442420 is an apocalyptic number.

25442420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25442420 is an abundant number, since it is smaller than the sum of its proper divisors (28168564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25442420 is a wasteful number, since it uses less digits than its factorization.

25442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339 (or 4337 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 25442420 is about 5044.0479775672. The cubic root of 25442420 is about 294.1165564352.

Adding to 25442420 its reverse (2424452), we get a palindrome (27866872).

The spelling of 25442420 in words is "twenty-five million, four hundred forty-two thousand, four hundred twenty".