123170421 has 8 divisors (see below), whose sum is σ = 179157024. Its totient is φ = 74648720.

The previous prime is 123170417. The next prime is 123170561. The reversal of 123170421 is 124071321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123170421 - 2² = 123170417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866186 + ... + 1866251.

It is an arithmetic number, because the mean of its divisors is an integer number (22394628).

Almost surely, 2^123170421 is an apocalyptic number.

123170421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123170421 is a deficient number, since it is larger than the sum of its proper divisors (55986603).

123170421 is a wasteful number, since it uses less digits than its factorization.

123170421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732451.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 123170421 is about 11098.2170189630. The cubic root of 123170421 is about 497.5485618783.

The spelling of 123170421 in words is "one hundred twenty-three million, one hundred seventy thousand, four hundred twenty-one".