501272785 has 8 divisors (see below), whose sum is σ = 647798760. Its totient is φ = 370170624.

The previous prime is 501272767. The next prime is 501272819. The reversal of 501272785 is 587272105.

501272785 = 15831² + 15832².

It can be written as a sum of positive squares in 4 ways, for example, as 10029889 + 491242896 = 3167^2 + 22164^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 501272785 - 2¹⁵ = 501240017 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3855880 + ... + 3856009.

It is an arithmetic number, because the mean of its divisors is an integer number (80974845).

Almost surely, 2^501272785 is an apocalyptic number.

501272785 is the 15832-nd centered square number.

It is an amenable number.

501272785 is a deficient number, since it is larger than the sum of its proper divisors (146525975).

501272785 is a wasteful number, since it uses less digits than its factorization.

501272785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7711907.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 501272785 is about 22389.1220238758. The cubic root of 501272785 is about 794.3734287490.

It can be divided in two parts, 50127 and 2785, that multiplied together give a triangular number (139603695 = T₁₆₇₀₉).

The spelling of 501272785 in words is "five hundred one million, two hundred seventy-two thousand, seven hundred eighty-five".