492011521 has 4 divisors (see below), whose sum is σ = 504011844. Its totient is φ = 480011200.

The previous prime is 492011519. The next prime is 492011537. The reversal of 492011521 is 125110294.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6426225 + 485585296 = 2535^2 + 22036^2 .

It is a cyclic number.

It is not a de Polignac number, because 492011521 - 2¹ = 492011519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492011551) 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, 6000100 + ... + 6000181.

It is an arithmetic number, because the mean of its divisors is an integer number (126002961).

It is a Proth number, since it is equal to 15015 ⋅ 2¹⁵ + 1 and 15015 < 2¹⁵.

Almost surely, 2^492011521 is an apocalyptic number.

492011521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

492011521 is a deficient number, since it is larger than the sum of its proper divisors (12000323).

492011521 is a wasteful number, since it uses less digits than its factorization.

492011521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000322.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 492011521 is about 22181.3327146950. The cubic root of 492011521 is about 789.4508393030.

The spelling of 492011521 in words is "four hundred ninety-two million, eleven thousand, five hundred twenty-one".