85420501 has 4 divisors (see below), whose sum is σ = 85478112. Its totient is φ = 85362892.

The previous prime is 85420493. The next prime is 85420513. The reversal of 85420501 is 10502458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10502458 = 2 ⋅5251229.

It is a cyclic number.

It is not a de Polignac number, because 85420501 - 2³ = 85420493 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 (85420541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26521 + ... + 29566.

It is an arithmetic number, because the mean of its divisors is an integer number (21369528).

Almost surely, 2^85420501 is an apocalyptic number.

It is an amenable number.

85420501 is a deficient number, since it is larger than the sum of its proper divisors (57611).

85420501 is a wasteful number, since it uses less digits than its factorization.

85420501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57610.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 85420501 is about 9242.3211911294. The cubic root of 85420501 is about 440.4068224290.

Adding to 85420501 its reverse (10502458), we get a palindrome (95922959).

The spelling of 85420501 in words is "eighty-five million, four hundred twenty thousand, five hundred one".