123401015 has 4 divisors (see below), whose sum is σ = 148081224. Its totient is φ = 98720808.

The previous prime is 123400999. The next prime is 123401017. The reversal of 123401015 is 510104321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123401015 - 2⁴ = 123400999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123400984 and 123401002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123401017) 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, 12340097 + ... + 12340106.

It is an arithmetic number, because the mean of its divisors is an integer number (37020306).

Almost surely, 2^123401015 is an apocalyptic number.

123401015 is a deficient number, since it is larger than the sum of its proper divisors (24680209).

123401015 is an equidigital number, since it uses as much as digits as its factorization.

123401015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24680208.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 123401015 is about 11108.6009470140. The cubic root of 123401015 is about 497.8588641626.

Adding to 123401015 its reverse (510104321), we get a palindrome (633505336).

The spelling of 123401015 in words is "one hundred twenty-three million, four hundred one thousand, fifteen".