501421306 has 4 divisors (see below), whose sum is σ = 752131962. Its totient is φ = 250710652.

The previous prime is 501421301. The next prime is 501421309. The reversal of 501421306 is 603124105.

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., 383807281 + 117614025 = 19591^2 + 10845^2 .

It is a super-2 number, since 2×501421306² = 502846652221491272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (501421301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125355325 + ... + 125355328.

Almost surely, 2^501421306 is an apocalyptic number.

501421306 is a deficient number, since it is larger than the sum of its proper divisors (250710656).

501421306 is a wasteful number, since it uses less digits than its factorization.

501421306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250710655.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 501421306 is about 22392.4385898455. The cubic root of 501421306 is about 794.4518753814.

The spelling of 501421306 in words is "five hundred one million, four hundred twenty-one thousand, three hundred six".