494749251 has 48 divisors (see below), whose sum is σ = 782683200. Its totient is φ = 300174336.

The previous prime is 494749187. The next prime is 494749267. The reversal of 494749251 is 152947494.

494749251 is a `hidden beast` number, since 49 + 474 + 92 + 51 = 666.

It is not a de Polignac number, because 494749251 - 2⁶ = 494749187 is a prime.

It is a super-2 number, since 2×494749251² = 489553642730122002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (362880) is a multiple of the sum of its prime factors (1260).

It is a junction number, because it is equal to n+sod(n) for n = 494749197 and 494749206.

It is not an unprimeable number, because it can be changed into a prime (494749951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437655 + ... + 438783.

It is an arithmetic number, because the mean of its divisors is an integer number (16305900).

Almost surely, 2^494749251 is an apocalyptic number.

494749251 is a deficient number, since it is larger than the sum of its proper divisors (287933949).

494749251 is a wasteful number, since it uses less digits than its factorization.

494749251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1257 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 494749251 is about 22242.9595827534. The cubic root of 494749251 is about 790.9123950750.

The spelling of 494749251 in words is "four hundred ninety-four million, seven hundred forty-nine thousand, two hundred fifty-one".