25430100 has 144 divisors (see below), whose sum is σ = 79161600. Its totient is φ = 6289920.

The previous prime is 25430081. The next prime is 25430101. The reversal of 25430100 is 103452.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 25430100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321861 + ... + 321939.

Almost surely, 2^25430100 is an apocalyptic number.

25430100 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 25430100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39580800).

25430100 is an abundant number, since it is smaller than the sum of its proper divisors (53731500).

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

25430100 is a wasteful number, since it uses less digits than its factorization.

25430100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 25430100 is about 5042.8265883332. The cubic root of 25430100 is about 294.0690753517.

Adding to 25430100 its reverse (103452), we get a palindrome (25533552).

The spelling of 25430100 in words is "twenty-five million, four hundred thirty thousand, one hundred".