22501242 has 12 divisors (see below), whose sum is σ = 48752730. Its totient is φ = 7500408.

The previous prime is 22501231. The next prime is 22501261. The reversal of 22501242 is 24210522.

It can be written as a sum of positive squares in only one way, i.e., 21538881 + 962361 = 4641^2 + 981^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1250069 = 22501242 / (2 + 2 + 5 + 0 + 1 + 2 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625017 + ... + 625052.

Almost surely, 2^22501242 is an apocalyptic number.

22501242 is an abundant number, since it is smaller than the sum of its proper divisors (26251488).

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

22501242 is a wasteful number, since it uses less digits than its factorization.

22501242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250077 (or 1250074 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22501242 is about 4743.5474067411. The cubic root of 22501242 is about 282.3160030876.

Adding to 22501242 its reverse (24210522), we get a palindrome (46711764).

It can be divided in two parts, 22 and 501242, that added together give a square (501264 = 708²).

The spelling of 22501242 in words is "twenty-two million, five hundred one thousand, two hundred forty-two".