25250000 has 70 divisors (see below), whose sum is σ = 61757022. Its totient is φ = 10000000.

The previous prime is 25249999. The next prime is 25250003. The reversal of 25250000 is 5252.

It can be written as a sum of positive squares in 7 ways, for example, as 23580736 + 1669264 = 4856^2 + 1292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25250003) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 249950 + ... + 250050.

Almost surely, 2^25250000 is an apocalyptic number.

25250000 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 25250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30878511).

25250000 is an abundant number, since it is smaller than the sum of its proper divisors (36507022).

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

25250000 is an frugal number, since it uses more digits than its factorization.

25250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 25250000 is about 5024.9378105604. The cubic root of 25250000 is about 293.3732154221.

Adding to 25250000 its reverse (5252), we get a palindrome (25255252).

It can be divided in two parts, 25 and 250000, that multiplied together give a 4-th power (6250000 = 50⁴).

The spelling of 25250000 in words is "twenty-five million, two hundred fifty thousand".