851242495 has 16 divisors (see below), whose sum is σ = 1040870880. Its totient is φ = 668131200.

The previous prime is 851242471. The next prime is 851242507. The reversal of 851242495 is 594242158.

It is a happy number.

It is not a de Polignac number, because 851242495 - 2¹⁷ = 851111423 is a prime.

It is a super-2 number, since 2×851242495² = 1449227570587650050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124465 + ... + 131125.

It is an arithmetic number, because the mean of its divisors is an integer number (65054430).

Almost surely, 2^851242495 is an apocalyptic number.

851242495 is a deficient number, since it is larger than the sum of its proper divisors (189628385).

851242495 is a wasteful number, since it uses less digits than its factorization.

851242495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7146.

The product of its digits is 115200, while the sum is 40.

The square root of 851242495 is about 29176.0603063539. The cubic root of 851242495 is about 947.7295717069.

The spelling of 851242495 in words is "eight hundred fifty-one million, two hundred forty-two thousand, four hundred ninety-five".