85461021 has 8 divisors (see below), whose sum is σ = 126608960. Its totient is φ = 56973996.

The previous prime is 85461001. The next prime is 85461029. The reversal of 85461021 is 12016458.

It is not a de Polignac number, because 85461021 - 2⁶ = 85460957 is a prime.

It is a super-2 number, since 2×85461021² = 14607172220724882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3165223 = 85461021 / (8 + 5 + 4 + 6 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85461029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582585 + ... + 1582638.

It is an arithmetic number, because the mean of its divisors is an integer number (15826120).

Almost surely, 2^85461021 is an apocalyptic number.

It is an amenable number.

85461021 is a deficient number, since it is larger than the sum of its proper divisors (41147939).

85461021 is a wasteful number, since it uses less digits than its factorization.

85461021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165232 (or 3165226 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 85461021 is about 9244.5130212467. The cubic root of 85461021 is about 440.4764484293.

Adding to 85461021 its reverse (12016458), we get a palindrome (97477479).

The spelling of 85461021 in words is "eighty-five million, four hundred sixty-one thousand, twenty-one".