123421401 has 12 divisors (see below), whose sum is σ = 184878512. Its totient is φ = 82280772.

The previous prime is 123421399. The next prime is 123421421. The reversal of 123421401 is 104124321.

It is not a de Polignac number, because 123421401 - 2¹ = 123421399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123421421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253711 + ... + 254196.

Almost surely, 2^123421401 is an apocalyptic number.

It is an amenable number.

123421401 is a deficient number, since it is larger than the sum of its proper divisors (61457111).

123421401 is an frugal number, since it uses more digits than its factorization.

123421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507922 (or 507910 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 123421401 is about 11109.5184864152. The cubic root of 123421401 is about 497.8862782860.

Adding to 123421401 its reverse (104124321), we get a palindrome (227545722).

The spelling of 123421401 in words is "one hundred twenty-three million, four hundred twenty-one thousand, four hundred one".