23507121 has 16 divisors (see below), whose sum is σ = 34273728. Its totient is φ = 14212800.

The previous prime is 23507117. The next prime is 23507179. The reversal of 23507121 is 12170532.

It is not a de Polignac number, because 23507121 - 2² = 23507117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23507221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24511 + ... + 25451.

It is an arithmetic number, because the mean of its divisors is an integer number (2142108).

Almost surely, 2^23507121 is an apocalyptic number.

It is an amenable number.

23507121 is a deficient number, since it is larger than the sum of its proper divisors (10766607).

23507121 is a wasteful number, since it uses less digits than its factorization.

23507121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 23507121 is about 4848.4142768538. The cubic root of 23507121 is about 286.4616446130.

Adding to 23507121 its reverse (12170532), we get a palindrome (35677653).

The spelling of 23507121 in words is "twenty-three million, five hundred seven thousand, one hundred twenty-one".