495145257 has 16 divisors (see below), whose sum is σ = 664437312. Its totient is φ = 327983040.

The previous prime is 495145243. The next prime is 495145279. The reversal of 495145257 is 752541594.

It is not a de Polignac number, because 495145257 - 2¹² = 495141161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (495145297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387103 + ... + 388379.

It is an arithmetic number, because the mean of its divisors is an integer number (41527332).

Almost surely, 2^495145257 is an apocalyptic number.

It is an amenable number.

495145257 is a deficient number, since it is larger than the sum of its proper divisors (169292055).

495145257 is a wasteful number, since it uses less digits than its factorization.

495145257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008.

The product of its digits is 252000, while the sum is 42.

The square root of 495145257 is about 22251.8596301523. The cubic root of 495145257 is about 791.1233588614.

The spelling of 495145257 in words is "four hundred ninety-five million, one hundred forty-five thousand, two hundred fifty-seven".