123470145 has 24 divisors (see below), whose sum is σ = 216426600. Its totient is φ = 65108736.

The previous prime is 123470129. The next prime is 123470153. The reversal of 123470145 is 541074321.

It can be written as a sum of positive squares in 4 ways, for example, as 16719921 + 106750224 = 4089^2 + 10332^2 .

It is not a de Polignac number, because 123470145 - 2⁴ = 123470129 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11410 + ... + 19419.

It is an arithmetic number, because the mean of its divisors is an integer number (9017775).

Almost surely, 2^123470145 is an apocalyptic number.

123470145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123470145 is a deficient number, since it is larger than the sum of its proper divisors (92956455).

123470145 is a wasteful number, since it uses less digits than its factorization.

123470145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30929 (or 30926 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 123470145 is about 11111.7120643040. The cubic root of 123470145 is about 497.9518146633.

The spelling of 123470145 in words is "one hundred twenty-three million, four hundred seventy thousand, one hundred forty-five".