1285727274 has 48 divisors (see below), whose sum is σ = 3009667752. Its totient is φ = 394337664.

The previous prime is 1285727237. The next prime is 1285727279. The reversal of 1285727274 is 4727275821.

1285727274 is a `hidden beast` number, since 1 + 2 + 8 + 572 + 7 + 2 + 74 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 223293249 + 1062434025 = 14943^2 + 32595^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1285727279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65512 + ... + 82844.

Almost surely, 2^1285727274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285727274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504833876).

1285727274 is an abundant number, since it is smaller than the sum of its proper divisors (1723940478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285727274 is a wasteful number, since it uses less digits than its factorization.

1285727274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17671 (or 17668 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

The square root of 1285727274 is about 35857.0393925656. The cubic root of 1285727274 is about 1087.3840345627.

The spelling of 1285727274 in words is "one billion, two hundred eighty-five million, seven hundred twenty-seven thousand, two hundred seventy-four".