85402471 has 8 divisors (see below), whose sum is σ = 106475904. Its totient is φ = 66547320.

The previous prime is 85402463. The next prime is 85402487. The reversal of 85402471 is 17420458.

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

It is not a de Polignac number, because 85402471 - 2³ = 85402463 is a prime.

It is a super-3 number, since 3×85402471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85402411) 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, 554485 + ... + 554638.

It is an arithmetic number, because the mean of its divisors is an integer number (13309488).

Almost surely, 2^85402471 is an apocalyptic number.

85402471 is a deficient number, since it is larger than the sum of its proper divisors (21073433).

85402471 is a wasteful number, since it uses less digits than its factorization.

85402471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109141.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 85402471 is about 9241.3457353353. The cubic root of 85402471 is about 440.3758341859.

It can be divided in two parts, 8540 and 2471, that added together give a palindrome (11011).

The spelling of 85402471 in words is "eighty-five million, four hundred two thousand, four hundred seventy-one".