123857401 has 4 divisors (see below), whose sum is σ = 124480000. Its totient is φ = 123234804.

The previous prime is 123857399. The next prime is 123857417. The reversal of 123857401 is 104758321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104758321 = 41 ⋅2555081.

It is a cyclic number.

It is not a de Polignac number, because 123857401 - 2¹ = 123857399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123857491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311001 + ... + 311398.

It is an arithmetic number, because the mean of its divisors is an integer number (31120000).

Almost surely, 2^123857401 is an apocalyptic number.

It is an amenable number.

123857401 is a deficient number, since it is larger than the sum of its proper divisors (622599).

123857401 is an equidigital number, since it uses as much as digits as its factorization.

123857401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622598.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 123857401 is about 11129.1239996686. The cubic root of 123857401 is about 498.4718690563.

The spelling of 123857401 in words is "one hundred twenty-three million, eight hundred fifty-seven thousand, four hundred one".