123421501 has 16 divisors (see below), whose sum is σ = 144488448. Its totient is φ = 103244400.

The previous prime is 123421499. The next prime is 123421523. The reversal of 123421501 is 105124321.

It is not a de Polignac number, because 123421501 - 2¹ = 123421499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421541) 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, 49986 + ... + 52396.

It is an arithmetic number, because the mean of its divisors is an integer number (9030528).

Almost surely, 2^123421501 is an apocalyptic number.

It is an amenable number.

123421501 is a deficient number, since it is larger than the sum of its proper divisors (21066947).

123421501 is a wasteful number, since it uses less digits than its factorization.

123421501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123421501 is about 11109.5229870593. The cubic root of 123421501 is about 497.8864127538.

Adding to 123421501 its reverse (105124321), we get a palindrome (228545822).

The spelling of 123421501 in words is "one hundred twenty-three million, four hundred twenty-one thousand, five hundred one".