492978251 has 16 divisors (see below), whose sum is σ = 523031040. Its totient is φ = 463700160.

The previous prime is 492978247. The next prime is 492978259. The reversal of 492978251 is 152879294.

It is a cyclic number.

It is not a de Polignac number, because 492978251 - 2² = 492978247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 492978196 and 492978205.

It is not an unprimeable number, because it can be changed into a prime (492978259) 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, 535970 + ... + 536888.

It is an arithmetic number, because the mean of its divisors is an integer number (32689440).

Almost surely, 2^492978251 is an apocalyptic number.

492978251 is a deficient number, since it is larger than the sum of its proper divisors (30052789).

492978251 is a wasteful number, since it uses less digits than its factorization.

492978251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306.

The product of its digits is 362880, while the sum is 47.

The square root of 492978251 is about 22203.1135429246. The cubic root of 492978251 is about 789.9675524781.

The spelling of 492978251 in words is "four hundred ninety-two million, nine hundred seventy-eight thousand, two hundred fifty-one".