123124402 has 4 divisors (see below), whose sum is σ = 184686606. Its totient is φ = 61562200.

The previous prime is 123124399. The next prime is 123124403. The reversal of 123124402 is 204421321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204421321 = 13 ⋅15724717.

It can be written as a sum of positive squares in only one way, i.e., 87590881 + 35533521 = 9359^2 + 5961^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123124402.

It is not an unprimeable number, because it can be changed into a prime (123124403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30781099 + ... + 30781102.

Almost surely, 2^123124402 is an apocalyptic number.

123124402 is a deficient number, since it is larger than the sum of its proper divisors (61562204).

123124402 is an equidigital number, since it uses as much as digits as its factorization.

123124402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61562203.

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

The square root of 123124402 is about 11096.1435643200. The cubic root of 123124402 is about 497.4865893711.

Adding to 123124402 its reverse (204421321), we get a palindrome (327545723).

The spelling of 123124402 in words is "one hundred twenty-three million, one hundred twenty-four thousand, four hundred two".