25450000 has 60 divisors (see below), whose sum is σ = 61753860. Its totient is φ = 10160000.

The previous prime is 25449997. The next prime is 25450001. The reversal of 25450000 is 5452.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17338896 + 8111104 = 4164^2 + 2848^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (25450001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49746 + ... + 50254.

It is an arithmetic number, because the mean of its divisors is an integer number (1029231).

Almost surely, 2^25450000 is an apocalyptic number.

25450000 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 25450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30876930).

25450000 is an abundant number, since it is smaller than the sum of its proper divisors (36303860).

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

25450000 is an frugal number, since it uses more digits than its factorization.

25450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 25450000 is about 5044.7993022518. The cubic root of 25450000 is about 294.1457620183.

Adding to 25450000 its reverse (5452), we get a palindrome (25455452).

The spelling of 25450000 in words is "twenty-five million, four hundred fifty thousand".