123621411 has 4 divisors (see below), whose sum is σ = 164828552. Its totient is φ = 82414272.

The previous prime is 123621409. The next prime is 123621413. The reversal of 123621411 is 114126321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123621409) and next prime (123621413).

It is not a de Polignac number, because 123621411 - 2¹ = 123621409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123621413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20603566 + ... + 20603571.

It is an arithmetic number, because the mean of its divisors is an integer number (41207138).

Almost surely, 2^123621411 is an apocalyptic number.

123621411 is a deficient number, since it is larger than the sum of its proper divisors (41207141).

123621411 is an equidigital number, since it uses as much as digits as its factorization.

123621411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41207140.

The product of its digits is 288, while the sum is 21.

The square root of 123621411 is about 11118.5165827101. The cubic root of 123621411 is about 498.1550822632.

Adding to 123621411 its reverse (114126321), we get a palindrome (237747732).

The spelling of 123621411 in words is "one hundred twenty-three million, six hundred twenty-one thousand, four hundred eleven".