461087021 has 4 divisors (see below), whose sum is σ = 461257500. Its totient is φ = 460916544.

The previous prime is 461087009. The next prime is 461087023. The reversal of 461087021 is 120780164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130210921 + 330876100 = 11411^2 + 18190^2 .

It is a cyclic number.

It is not a de Polignac number, because 461087021 - 2¹⁴ = 461070637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461087023) 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 in 3 ways as a sum of consecutive naturals, for example, 81116 + ... + 86613.

It is an arithmetic number, because the mean of its divisors is an integer number (115314375).

Almost surely, 2^461087021 is an apocalyptic number.

It is an amenable number.

461087021 is a deficient number, since it is larger than the sum of its proper divisors (170479).

461087021 is a wasteful number, since it uses less digits than its factorization.

461087021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170478.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 461087021 is about 21472.9369439767. The cubic root of 461087021 is about 772.5518422981.

The spelling of 461087021 in words is "four hundred sixty-one million, eighty-seven thousand, twenty-one".