25742220 has 48 divisors (see below), whose sum is σ = 82376448. Its totient is φ = 5883840.

The previous prime is 25742179. The next prime is 25742237. The reversal of 25742220 is 2224752.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 30226 + ... + 31065.

It is an arithmetic number, because the mean of its divisors is an integer number (1716176).

Almost surely, 2^25742220 is an apocalyptic number.

25742220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25742220 is an abundant number, since it is smaller than the sum of its proper divisors (56634228).

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

25742220 is a wasteful number, since it uses less digits than its factorization.

25742220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61310 (or 61308 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 25742220 is about 5073.6791384556. The cubic root of 25742220 is about 295.2672862388.

Adding to 25742220 its reverse (2224752), we get a palindrome (27966972).

The spelling of 25742220 in words is "twenty-five million, seven hundred forty-two thousand, two hundred twenty".