123142069 has 4 divisors (see below), whose sum is σ = 128496096. Its totient is φ = 117788044.

The previous prime is 123142049. The next prime is 123142081. The reversal of 123142069 is 960241321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123142069 - 2¹³ = 123133877 is a prime.

It is a super-2 number, since 2×123142069² = 30327938315201522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123142009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676979 + ... + 2677024.

It is an arithmetic number, because the mean of its divisors is an integer number (32124024).

Almost surely, 2^123142069 is an apocalyptic number.

It is an amenable number.

123142069 is a deficient number, since it is larger than the sum of its proper divisors (5354027).

123142069 is an equidigital number, since it uses as much as digits as its factorization.

123142069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354026.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 123142069 is about 11096.9396231574. The cubic root of 123142069 is about 497.5103828544.

The spelling of 123142069 in words is "one hundred twenty-three million, one hundred forty-two thousand, sixty-nine".