4012523 has 4 divisors (see below), whose sum is σ = 4039248. Its totient is φ = 3985800.

The previous prime is 4012507. The next prime is 4012537. The reversal of 4012523 is 3252104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4012523 - 2⁴ = 4012507 is a prime.

It is a super-2 number, since 2×4012523² = 32200681651058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4012573) 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, 13136 + ... + 13437.

It is an arithmetic number, because the mean of its divisors is an integer number (1009812).

Almost surely, 2^4012523 is an apocalyptic number.

4012523 is a deficient number, since it is larger than the sum of its proper divisors (26725).

4012523 is a wasteful number, since it uses less digits than its factorization.

4012523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26724.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 4012523 is about 2003.1283034294. The cubic root of 4012523 is about 158.9055911465.

Adding to 4012523 its reverse (3252104), we get a palindrome (7264627).

The spelling of 4012523 in words is "four million, twelve thousand, five hundred twenty-three".