123145516 has 48 divisors (see below), whose sum is σ = 242851840. Its totient is φ = 54250560.

The previous prime is 123145511. The next prime is 123145537. The reversal of 123145516 is 615541321.

It is a super-2 number, since 2×123145516² = 30329636221812512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123145511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126865 + ... + 127831.

Almost surely, 2^123145516 is an apocalyptic number.

It is an amenable number.

123145516 is a deficient number, since it is larger than the sum of its proper divisors (119706324).

123145516 is a wasteful number, since it uses less digits than its factorization.

123145516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1092 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 123145516 is about 11097.0949351621. The cubic root of 123145516 is about 497.5150249244.

Adding to 123145516 its reverse (615541321), we get a palindrome (738686837).

The spelling of 123145516 in words is "one hundred twenty-three million, one hundred forty-five thousand, five hundred sixteen".