22421725 has 12 divisors (see below), whose sum is σ = 29438964. Its totient is φ = 16881920.

The previous prime is 22421699. The next prime is 22421747. The reversal of 22421725 is 52712422.

It can be written as a sum of positive squares in 6 ways, for example, as 1058841 + 21362884 = 1029^2 + 4622^2 .

It is not a de Polignac number, because 22421725 - 2²¹ = 20324573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22421725.

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, 25954 + ... + 26803.

It is an arithmetic number, because the mean of its divisors is an integer number (2453247).

Almost surely, 2^22421725 is an apocalyptic number.

22421725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22421725 is a deficient number, since it is larger than the sum of its proper divisors (7017239).

22421725 is a wasteful number, since it uses less digits than its factorization.

22421725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52784 (or 52779 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 22421725 is about 4735.1583922821. The cubic root of 22421725 is about 281.9830523155.

The spelling of 22421725 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred twenty-five".