25445742 has 32 divisors (see below), whose sum is σ = 58905600. Its totient is φ = 7177248.

The previous prime is 25445741. The next prime is 25445743. The reversal of 25445742 is 24754452.

It is an interprime number because it is at equal distance from previous prime (25445741) and next prime (25445743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25445741) 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 15 ways as a sum of consecutive naturals, for example, 517 + ... + 7152.

It is an arithmetic number, because the mean of its divisors is an integer number (1840800).

Almost surely, 2^25445742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25445742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29452800).

25445742 is an abundant number, since it is smaller than the sum of its proper divisors (33459858).

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

25445742 is a wasteful number, since it uses less digits than its factorization.

25445742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7760.

The product of its digits is 44800, while the sum is 33.

The square root of 25445742 is about 5044.3772658278. The cubic root of 25445742 is about 294.1293567463.

The spelling of 25445742 in words is "twenty-five million, four hundred forty-five thousand, seven hundred forty-two".