137442123 has 64 divisors (see below), whose sum is σ = 252851200. Its totient is φ = 72277920.

The previous prime is 137442121. The next prime is 137442131. The reversal of 137442123 is 321244731.

It is a happy number.

It is not a de Polignac number, because 137442123 - 2¹ = 137442121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (137442121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 415068 + ... + 415398.

It is an arithmetic number, because the mean of its divisors is an integer number (3950800).

Almost surely, 2^137442123 is an apocalyptic number.

137442123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

137442123 is a deficient number, since it is larger than the sum of its proper divisors (115409077).

137442123 is an equidigital number, since it uses as much as digits as its factorization.

137442123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 354 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 137442123 is about 11723.5712562342. The cubic root of 137442123 is about 516.0676290483.

Adding to 137442123 its reverse (321244731), we get a palindrome (458686854).

The spelling of 137442123 in words is "one hundred thirty-seven million, four hundred forty-two thousand, one hundred twenty-three".