123042137 has 2 divisors, whose sum is σ = 123042138. Its totient is φ = 123042136.

The previous prime is 123042133. The next prime is 123042149. The reversal of 123042137 is 731240321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 8637721 = 10696^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 123042137 - 2² = 123042133 is a prime.

It is a super-4 number, since 4×123042137⁴ (a number of 33 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (123042133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61521068 + 61521069.

It is an arithmetic number, because the mean of its divisors is an integer number (61521069).

Almost surely, 2^123042137 is an apocalyptic number.

It is an amenable number.

123042137 is a deficient number, since it is larger than the sum of its proper divisors (1).

123042137 is an equidigital number, since it uses as much as digits as its factorization.

123042137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 123042137 is about 11092.4360264101. The cubic root of 123042137 is about 497.3757668973.

Adding to 123042137 its reverse (731240321), we get a palindrome (854282458).

It can be divided in two parts, 12304 and 2137, that added together give a palindrome (14441).

The spelling of 123042137 in words is "one hundred twenty-three million, forty-two thousand, one hundred thirty-seven".