851242497 has 16 divisors (see below), whose sum is σ = 1303928832. Its totient is φ = 483875280.

The previous prime is 851242471. The next prime is 851242507. The reversal of 851242497 is 794242158.

851242497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 851242497 - 2²² = 847048193 is a prime.

It is a super-2 number, since 2×851242497² = 1449227577397590018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (851242297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102103 + ... + 110124.

It is an arithmetic number, because the mean of its divisors is an integer number (81495552).

Almost surely, 2^851242497 is an apocalyptic number.

It is an amenable number.

851242497 is a deficient number, since it is larger than the sum of its proper divisors (452686335).

851242497 is a wasteful number, since it uses less digits than its factorization.

851242497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212428.

The product of its digits is 161280, while the sum is 42.

The square root of 851242497 is about 29176.0603406286. The cubic root of 851242497 is about 947.7295724492.

The spelling of 851242497 in words is "eight hundred fifty-one million, two hundred forty-two thousand, four hundred ninety-seven".