123861401 has 4 divisors (see below), whose sum is σ = 123980304. Its totient is φ = 123742500.

The previous prime is 123861391. The next prime is 123861421. The reversal of 123861401 is 104168321.

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: 104168321 = 127 ⋅820223.

It is a cyclic number.

It is not a de Polignac number, because 123861401 - 2¹⁸ = 123599257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123861421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57875 + ... + 59976.

It is an arithmetic number, because the mean of its divisors is an integer number (30995076).

Almost surely, 2^123861401 is an apocalyptic number.

It is an amenable number.

123861401 is a deficient number, since it is larger than the sum of its proper divisors (118903).

123861401 is a wasteful number, since it uses less digits than its factorization.

123861401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118902.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 123861401 is about 11129.3037068812. The cubic root of 123861401 is about 498.4772350820.

The spelling of 123861401 in words is "one hundred twenty-three million, eight hundred sixty-one thousand, four hundred one".