22749145 has 8 divisors (see below), whose sum is σ = 28904904. Its totient is φ = 17128704.

The previous prime is 22749121. The next prime is 22749149. The reversal of 22749145 is 54194722.

It can be written as a sum of positive squares in 4 ways, for example, as 4052169 + 18696976 = 2013^2 + 4324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22749145 - 2¹⁵ = 22716377 is a prime.

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 22749145.

It is not an unprimeable number, because it can be changed into a prime (22749149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133734 + ... + 133903.

It is an arithmetic number, because the mean of its divisors is an integer number (3613113).

Almost surely, 2^22749145 is an apocalyptic number.

It is an amenable number.

22749145 is a deficient number, since it is larger than the sum of its proper divisors (6155759).

22749145 is a wasteful number, since it uses less digits than its factorization.

22749145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267659.

The product of its digits is 20160, while the sum is 34.

The square root of 22749145 is about 4769.6063778891. The cubic root of 22749145 is about 283.3490056690.

The spelling of 22749145 in words is "twenty-two million, seven hundred forty-nine thousand, one hundred forty-five".