25434144 has 72 divisors (see below), whose sum is σ = 73906560. Its totient is φ = 8293248.

The previous prime is 25434127. The next prime is 25434161. The reversal of 25434144 is 44143452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25434127) and next prime (25434161).

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12597 + ... + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (1026480).

Almost surely, 2^25434144 is an apocalyptic number.

25434144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25434144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36953280).

25434144 is an abundant number, since it is smaller than the sum of its proper divisors (48472416).

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

25434144 is a wasteful number, since it uses less digits than its factorization.

25434144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942 (or 1931 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 25434144 is about 5043.2275379959. The cubic root of 25434144 is about 294.0846625536.

Adding to 25434144 its reverse (44143452), we get a palindrome (69577596).

The spelling of 25434144 in words is "twenty-five million, four hundred thirty-four thousand, one hundred forty-four".