851252405 has 8 divisors (see below), whose sum is σ = 1054454784. Its totient is φ = 659034000.

The previous prime is 851252401. The next prime is 851252411. The reversal of 851252405 is 504252158.

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

It is not a de Polignac number, because 851252405 - 2² = 851252401 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 (851252401) 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, 2745821 + ... + 2746130.

It is an arithmetic number, because the mean of its divisors is an integer number (131806848).

Almost surely, 2^851252405 is an apocalyptic number.

It is an amenable number.

851252405 is a deficient number, since it is larger than the sum of its proper divisors (203202379).

851252405 is a wasteful number, since it uses less digits than its factorization.

851252405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491987.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 851252405 is about 29176.2301368768. The cubic root of 851252405 is about 947.7332494539.

The spelling of 851252405 in words is "eight hundred fifty-one million, two hundred fifty-two thousand, four hundred five".