2391123 has 16 divisors (see below), whose sum is σ = 3762176. Its totient is φ = 1321920.

The previous prime is 2391119. The next prime is 2391127. The reversal of 2391123 is 3211932.

It is a happy number.

2391123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2391119) and next prime (2391127).

It is not a de Polignac number, because 2391123 - 2² = 2391119 is a prime.

It is a super-2 number, since 2×2391123² = 11434938402258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

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 2391123.

It is not an unprimeable number, because it can be changed into a prime (2391127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186 + ... + 2487.

It is an arithmetic number, because the mean of its divisors is an integer number (235136).

2^2391123 is an apocalyptic number.

2391123 is a deficient number, since it is larger than the sum of its proper divisors (1371053).

2391123 is a wasteful number, since it uses less digits than its factorization.

2391123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714.

The product of its digits is 324, while the sum is 21.

The square root of 2391123 is about 1546.3256448756. The cubic root of 2391123 is about 133.7213150701.

The spelling of 2391123 in words is "two million, three hundred ninety-one thousand, one hundred twenty-three".