22420725 has 12 divisors (see below), whose sum is σ = 37069056. Its totient is φ = 11957680.

The previous prime is 22420693. The next prime is 22420747. The reversal of 22420725 is 52702422.

It is not a de Polignac number, because 22420725 - 2⁵ = 22420693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22420695 and 22420704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149397 + ... + 149546.

It is an arithmetic number, because the mean of its divisors is an integer number (3089088).

Almost surely, 2^22420725 is an apocalyptic number.

22420725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22420725 is a deficient number, since it is larger than the sum of its proper divisors (14648331).

22420725 is a wasteful number, since it uses less digits than its factorization.

22420725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298956 (or 298951 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22420725 is about 4735.0527980161. The cubic root of 22420725 is about 281.9788601426.

The spelling of 22420725 in words is "twenty-two million, four hundred twenty thousand, seven hundred twenty-five".