25545240 has 256 divisors, whose sum is σ = 101376000. Its totient is φ = 5598720.

The previous prime is 25545227. The next prime is 25545251. The reversal of 25545240 is 4254552.

25545240 = T₃₇₁ + T₃₇₂ + ... + T₅₈₈.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234306 + ... + 234414.

It is an arithmetic number, because the mean of its divisors is an integer number (396000).

Almost surely, 2^25545240 is an apocalyptic number.

25545240 is a gapful number since it is divisible by the number (20) 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 25545240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50688000).

25545240 is an abundant number, since it is smaller than the sum of its proper divisors (75830760).

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

25545240 is a wasteful number, since it uses less digits than its factorization.

25545240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 25545240 is about 5054.2299116680. The cubic root of 25545240 is about 294.5122265796.

Adding to 25545240 its reverse (4254552), we get a palindrome (29799792).

The spelling of 25545240 in words is "twenty-five million, five hundred forty-five thousand, two hundred forty".