494137261 has 4 divisors (see below), whose sum is σ = 501512512. Its totient is φ = 486762012.

The previous prime is 494137243. The next prime is 494137277. The reversal of 494137261 is 162731494.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 494137261 - 2⁵ = 494137229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 494137261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494137211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687525 + ... + 3687658.

It is an arithmetic number, because the mean of its divisors is an integer number (125378128).

Almost surely, 2^494137261 is an apocalyptic number.

It is an amenable number.

494137261 is a deficient number, since it is larger than the sum of its proper divisors (7375251).

494137261 is an equidigital number, since it uses as much as digits as its factorization.

494137261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375250.

The product of its digits is 36288, while the sum is 37.

The square root of 494137261 is about 22229.1983886059. The cubic root of 494137261 is about 790.5861488739.

The spelling of 494137261 in words is "four hundred ninety-four million, one hundred thirty-seven thousand, two hundred sixty-one".