123499420 has 48 divisors (see below), whose sum is σ = 295239168. Its totient is φ = 42954560.

The previous prime is 123499417. The next prime is 123499423. The reversal of 123499420 is 24994321.

It is an interprime number because it is at equal distance from previous prime (123499417) and next prime (123499423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123499423) 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, 7144 + ... + 17263.

It is an arithmetic number, because the mean of its divisors is an integer number (6150816).

Almost surely, 2^123499420 is an apocalyptic number.

123499420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123499420 is an abundant number, since it is smaller than the sum of its proper divisors (171739748).

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

123499420 is a wasteful number, since it uses less digits than its factorization.

123499420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450 (or 24448 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 123499420 is about 11113.0292899821. The cubic root of 123499420 is about 497.9911666525.

The spelling of 123499420 in words is "one hundred twenty-three million, four hundred ninety-nine thousand, four hundred twenty".