23742121 has 8 divisors (see below), whose sum is σ = 25646600. Its totient is φ = 21848832.

The previous prime is 23742119. The next prime is 23742127. The reversal of 23742121 is 12124732.

It can be written as a sum of positive squares in 4 ways, for example, as 7901721 + 15840400 = 2811^2 + 3980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23742121 - 2¹ = 23742119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23742092 and 23742101.

It is not an unprimeable number, because it can be changed into a prime (23742127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921 + ... + 7153.

It is an arithmetic number, because the mean of its divisors is an integer number (3205825).

Almost surely, 2^23742121 is an apocalyptic number.

It is an amenable number.

23742121 is a deficient number, since it is larger than the sum of its proper divisors (1904479).

23742121 is a wasteful number, since it uses less digits than its factorization.

23742121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595.

The product of its digits is 672, while the sum is 22.

The square root of 23742121 is about 4872.5887370062. The cubic root of 23742121 is about 287.4130640736.

Adding to 23742121 its reverse (12124732), we get a palindrome (35866853).

It can be divided in two parts, 23742 and 121, that multiplied together give a palindrome (2872782).

The spelling of 23742121 in words is "twenty-three million, seven hundred forty-two thousand, one hundred twenty-one".