123742572 has 24 divisors (see below), whose sum is σ = 289978416. Its totient is φ = 41069568.

The previous prime is 123742561. The next prime is 123742579. The reversal of 123742572 is 275247321.

It is not an unprimeable number, because it can be changed into a prime (123742579) 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, 19333 + ... + 24924.

It is an arithmetic number, because the mean of its divisors is an integer number (12082434).

Almost surely, 2^123742572 is an apocalyptic number.

123742572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123742572 is an abundant number, since it is smaller than the sum of its proper divisors (166235844).

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

123742572 is a wasteful number, since it uses less digits than its factorization.

123742572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44497 (or 44495 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 123742572 is about 11123.9638618615. The cubic root of 123742572 is about 498.3177759250.

Adding to 123742572 its reverse (275247321), we get a palindrome (398989893).

The spelling of 123742572 in words is "one hundred twenty-three million, seven hundred forty-two thousand, five hundred seventy-two".