123420115 has 16 divisors (see below), whose sum is σ = 182282688. Its totient is φ = 78120576.

The previous prime is 123420071. The next prime is 123420137. The reversal of 123420115 is 511024321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123420115 is a prime.

It is a super-2 number, since 2×123420115² = 30465049573226450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123420092 and 123420101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135172 + ... + 136081.

It is an arithmetic number, because the mean of its divisors is an integer number (11392668).

Almost surely, 2^123420115 is an apocalyptic number.

123420115 is a deficient number, since it is larger than the sum of its proper divisors (58862573).

123420115 is a wasteful number, since it uses less digits than its factorization.

123420115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271278.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123420115 is about 11109.4606079683. The cubic root of 123420115 is about 497.8845490236.

Adding to 123420115 its reverse (511024321), we get a palindrome (634444436).

The spelling of 123420115 in words is "one hundred twenty-three million, four hundred twenty thousand, one hundred fifteen".