5145128242 has 4 divisors (see below), whose sum is σ = 7717692366. Its totient is φ = 2572564120.

The previous prime is 5145128239. The next prime is 5145128243. The reversal of 5145128242 is 2428215415.

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., 4756998841 + 388129401 = 68971^2 + 19701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5145128198 and 5145128207.

It is not an unprimeable number, because it can be changed into a prime (5145128243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286282059 + ... + 1286282062.

Almost surely, 2^5145128242 is an apocalyptic number.

5145128242 is a deficient number, since it is larger than the sum of its proper divisors (2572564124).

5145128242 is a wasteful number, since it uses less digits than its factorization.

5145128242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572564123.

The product of its digits is 25600, while the sum is 34.

The square root of 5145128242 is about 71729.5492945550. The cubic root of 5145128242 is about 1726.3627953121.

The spelling of 5145128242 in words is "five billion, one hundred forty-five million, one hundred twenty-eight thousand, two hundred forty-two".