857420012479 has 8 divisors (see below), whose sum is σ = 869248036512. Its totient is φ = 845594219520.

The previous prime is 857420012467. The next prime is 857420012543. The reversal of 857420012479 is 974210024758.

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 857420012479 - 2⁵ = 857420012447 is a prime.

It is a super-3 number, since 3×857420012479³ (a number of 37 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 (857420012419) 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, 223647 + ... + 1328479.

It is an arithmetic number, because the mean of its divisors is an integer number (108656004564).

Almost surely, 2^857420012479 is an apocalyptic number.

857420012479 is a deficient number, since it is larger than the sum of its proper divisors (11828024033).

857420012479 is a wasteful number, since it uses less digits than its factorization.

857420012479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115537.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 857420012479 in words is "eight hundred fifty-seven billion, four hundred twenty million, twelve thousand, four hundred seventy-nine".