25419420 has 240 divisors, whose sum is σ = 92207808. Its totient is φ = 5806080.

The previous prime is 25419413. The next prime is 25419421. The reversal of 25419420 is 2491452.

It is a super-2 number, since 2×25419420² = 1292293826272800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25419421) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 357985 + ... + 358055.

Almost surely, 2^25419420 is an apocalyptic number.

25419420 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 25419420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46103904).

25419420 is an abundant number, since it is smaller than the sum of its proper divisors (66788388).

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

25419420 is a wasteful number, since it uses less digits than its factorization.

25419420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25419420 is about 5041.7675472001. The cubic root of 25419420 is about 294.0279023914.

The spelling of 25419420 in words is "twenty-five million, four hundred nineteen thousand, four hundred twenty".