25417530 has 64 divisors (see below), whose sum is σ = 70744320. Its totient is φ = 6481728.

The previous prime is 25417523. The next prime is 25417549. The reversal of 25417530 is 3571452.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 25417494 and 25417503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4164 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (1105380).

Almost surely, 2^25417530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25417530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35372160).

25417530 is an abundant number, since it is smaller than the sum of its proper divisors (45326790).

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

25417530 is a wasteful number, since it uses less digits than its factorization.

25417530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 25417530 is about 5041.5801094498. The cubic root of 25417530 is about 294.0206149643.

Adding to 25417530 its reverse (3571452), we get a palindrome (28988982).

The spelling of 25417530 in words is "twenty-five million, four hundred seventeen thousand, five hundred thirty".