124400002 has 4 divisors (see below), whose sum is σ = 186600006. Its totient is φ = 62200000.

The previous prime is 124399997. The next prime is 124400009. The reversal of 124400002 is 200004421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200004421 = 61 ⋅3278761.

It can be written as a sum of positive squares in only one way, i.e., 123187801 + 1212201 = 11099^2 + 1101^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (124400009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31099999 + ... + 31100002.

Almost surely, 2^124400002 is an apocalyptic number.

124400002 is a deficient number, since it is larger than the sum of its proper divisors (62200004).

124400002 is an equidigital number, since it uses as much as digits as its factorization.

124400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62200003.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 124400002 is about 11153.4748845371. The cubic root of 124400002 is about 499.1987192509.

Adding to 124400002 its reverse (200004421), we get a palindrome (324404423).

The spelling of 124400002 in words is "one hundred twenty-four million, four hundred thousand, two".