23120145 has 12 divisors (see below), whose sum is σ = 40074996. Its totient is φ = 12330720.

The previous prime is 23120039. The next prime is 23120171. The reversal of 23120145 is 54102132.

It can be written as a sum of positive squares in 2 ways, for example, as 10246401 + 12873744 = 3201^2 + 3588^2 .

It is not a de Polignac number, because 23120145 - 2⁹ = 23119633 is a prime.

It is a super-2 number, since 2×23120145² = 1069082209642050, which contains 22 as substring.

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, 256846 + ... + 256935.

It is an arithmetic number, because the mean of its divisors is an integer number (3339583).

Almost surely, 2^23120145 is an apocalyptic number.

It is an amenable number.

23120145 is a deficient number, since it is larger than the sum of its proper divisors (16954851).

23120145 is a wasteful number, since it uses less digits than its factorization.

23120145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513792 (or 513789 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 23120145 is about 4808.3411900571. The cubic root of 23120145 is about 284.8810214359.

Adding to 23120145 its reverse (54102132), we get a palindrome (77222277).

The spelling of 23120145 in words is "twenty-three million, one hundred twenty thousand, one hundred forty-five".