123261870 has 24 divisors (see below), whose sum is σ = 295974504. Its totient is φ = 32853616.

The previous prime is 123261857. The next prime is 123261913. The reversal of 123261870 is 78162321.

It is a super-3 number, since 3×123261870³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59797 + ... + 61823.

It is an arithmetic number, because the mean of its divisors is an integer number (12332271).

Almost surely, 2^123261870 is an apocalyptic number.

123261870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123261870 is an abundant number, since it is smaller than the sum of its proper divisors (172712634).

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

123261870 is an frugal number, since it uses more digits than its factorization.

123261870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 123261870 is about 11102.3362406297. The cubic root of 123261870 is about 497.6716679022.

Multiplying 123261870 by its sum of digits (30), we get a square (3697856100 = 60810²).

123261870 divided by its sum of digits (30) gives a square (4108729 = 2027²).

It can be divided in two parts, 12326 and 1870, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 123261870 in words is "one hundred twenty-three million, two hundred sixty-one thousand, eight hundred seventy".