1286742252 has 24 divisors (see below), whose sum is σ = 3003033600. Its totient is φ = 428823376.

The previous prime is 1286742251. The next prime is 1286742253. The reversal of 1286742252 is 2522476821.

It is an interprime number because it is at equal distance from previous prime (1286742251) and next prime (1286742253).

It is a super-4 number, since 4×1286742252⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1286742252.

It is not an unprimeable number, because it can be changed into a prime (1286742251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72649 + ... + 88607.

It is an arithmetic number, because the mean of its divisors is an integer number (125126400).

Almost surely, 2^1286742252 is an apocalyptic number.

1286742252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1286742252 is an abundant number, since it is smaller than the sum of its proper divisors (1716291348).

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

1286742252 is a wasteful number, since it uses less digits than its factorization.

1286742252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22685 (or 22683 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 1286742252 is about 35871.1897210003. The cubic root of 1286742252 is about 1087.6700933049.

The spelling of 1286742252 in words is "one billion, two hundred eighty-six million, seven hundred forty-two thousand, two hundred fifty-two".