123200542 has 4 divisors (see below), whose sum is σ = 184800816. Its totient is φ = 61600270.

The previous prime is 123200533. The next prime is 123200551. The reversal of 123200542 is 245002321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245002321 = 19 ⋅12894859.

It is an interprime number because it is at equal distance from previous prime (123200533) and next prime (123200551).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30800134 + ... + 30800137.

It is an arithmetic number, because the mean of its divisors is an integer number (46200204).

Almost surely, 2^123200542 is an apocalyptic number.

123200542 is a deficient number, since it is larger than the sum of its proper divisors (61600274).

123200542 is an equidigital number, since it uses as much as digits as its factorization.

123200542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61600273.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 123200542 is about 11099.5739557877. The cubic root of 123200542 is about 497.5891166333.

Adding to 123200542 its reverse (245002321), we get a palindrome (368202863).

The spelling of 123200542 in words is "one hundred twenty-three million, two hundred thousand, five hundred forty-two".