22742057 has 4 divisors (see below), whose sum is σ = 24491460. Its totient is φ = 20992656.

The previous prime is 22742053. The next prime is 22742059. The reversal of 22742057 is 75024722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75024722 = 2 ⋅37512361.

It can be written as a sum of positive squares in 2 ways, for example, as 13402921 + 9339136 = 3661^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 22742057 - 2² = 22742053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22742053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874682 + ... + 874707.

It is an arithmetic number, because the mean of its divisors is an integer number (6122865).

Almost surely, 2^22742057 is an apocalyptic number.

It is an amenable number.

22742057 is a deficient number, since it is larger than the sum of its proper divisors (1749403).

22742057 is a wasteful number, since it uses less digits than its factorization.

22742057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749402.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 22742057 is about 4768.8632817475. The cubic root of 22742057 is about 283.3195747260.

Adding to 22742057 its reverse (75024722), we get a palindrome (97766779).

The spelling of 22742057 in words is "twenty-two million, seven hundred forty-two thousand, fifty-seven".