2123742 has 32 divisors (see below), whose sum is σ = 4603392. Its totient is φ = 650624.

The previous prime is 2123741. The next prime is 2123743. The reversal of 2123742 is 2473212.

It is an interprime number because it is at equal distance from previous prime (2123741) and next prime (2123743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123741) 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, 4573 + ... + 5015.

It is an arithmetic number, because the mean of its divisors is an integer number (143856).

2^2123742 is an apocalyptic number.

2123742 is an abundant number, since it is smaller than the sum of its proper divisors (2479650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123742 is a wasteful number, since it uses less digits than its factorization.

2123742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 672, while the sum is 21.

The square root of 2123742 is about 1457.3064193916. The cubic root of 2123742 is about 128.5387045466.

Adding to 2123742 its reverse (2473212), we get a palindrome (4596954).

The spelling of 2123742 in words is "two million, one hundred twenty-three thousand, seven hundred forty-two".