124002145 has 4 divisors (see below), whose sum is σ = 148802580. Its totient is φ = 99201712.

The previous prime is 124002127. The next prime is 124002167. The reversal of 124002145 is 541200421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541200421 = 83 ⋅6520487.

It can be written as a sum of positive squares in 2 ways, for example, as 81504784 + 42497361 = 9028^2 + 6519^2 .

It is a cyclic number.

It is not a de Polignac number, because 124002145 - 2⁷ = 124002017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12400210 + ... + 12400219.

It is an arithmetic number, because the mean of its divisors is an integer number (37200645).

Almost surely, 2^124002145 is an apocalyptic number.

It is an amenable number.

124002145 is a deficient number, since it is larger than the sum of its proper divisors (24800435).

124002145 is an equidigital number, since it uses as much as digits as its factorization.

124002145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24800434.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 124002145 is about 11135.6250385867. The cubic root of 124002145 is about 498.6659705630.

Adding to 124002145 its reverse (541200421), we get a palindrome (665202566).

The spelling of 124002145 in words is "one hundred twenty-four million, two thousand, one hundred forty-five".