5142550121 has 4 divisors (see below), whose sum is σ = 5143353744. Its totient is φ = 5141746500.

The previous prime is 5142550097. The next prime is 5142550159. The reversal of 5142550121 is 1210552415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5142550121 is a prime.

It is a super-2 number, since 2×5142550121² = 52891643493994229282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5142550321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392135 + ... + 405036.

It is an arithmetic number, because the mean of its divisors is an integer number (1285838436).

Almost surely, 2^5142550121 is an apocalyptic number.

It is an amenable number.

5142550121 is a deficient number, since it is larger than the sum of its proper divisors (803623).

5142550121 is an equidigital number, since it uses as much as digits as its factorization.

5142550121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803622.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 5142550121 is about 71711.5759204886. The cubic root of 5142550121 is about 1726.0743984979.

The spelling of 5142550121 in words is "five billion, one hundred forty-two million, five hundred fifty thousand, one hundred twenty-one".