123401242 has 4 divisors (see below), whose sum is σ = 185101866. Its totient is φ = 61700620.

The previous prime is 123401221. The next prime is 123401261. The reversal of 123401242 is 242104321.

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

It can be written as a sum of positive squares in only one way, i.e., 74666881 + 48734361 = 8641^2 + 6981^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30850309 + ... + 30850312.

Almost surely, 2^123401242 is an apocalyptic number.

123401242 is a deficient number, since it is larger than the sum of its proper divisors (61700624).

123401242 is an equidigital number, since it uses as much as digits as its factorization.

123401242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61700623.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123401242 is about 11108.6111643175. The cubic root of 123401242 is about 497.8591694380.

Adding to 123401242 its reverse (242104321), we get a palindrome (365505563).

The spelling of 123401242 in words is "one hundred twenty-three million, four hundred one thousand, two hundred forty-two".