501021145 has 4 divisors (see below), whose sum is σ = 601225380. Its totient is φ = 400816912.

The previous prime is 501021133. The next prime is 501021151. The reversal of 501021145 is 541120105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541120105 = 5 ⋅108224021.

It can be written as a sum of positive squares in 2 ways, for example, as 196588441 + 304432704 = 14021^2 + 17448^2 .

It is a cyclic number.

It is not a de Polignac number, because 501021145 - 2⁵ = 501021113 is a prime.

It is a super-2 number, since 2×501021145² = 502044375474222050, which contains 22 as substring.

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, 50102110 + ... + 50102119.

It is an arithmetic number, because the mean of its divisors is an integer number (150306345).

Almost surely, 2^501021145 is an apocalyptic number.

It is an amenable number.

501021145 is a deficient number, since it is larger than the sum of its proper divisors (100204235).

501021145 is a wasteful number, since it uses less digits than its factorization.

501021145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100204234.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 501021145 is about 22383.5016250809. The cubic root of 501021145 is about 794.2404807851.

The spelling of 501021145 in words is "five hundred one million, twenty-one thousand, one hundred forty-five".