1272774340 has 24 divisors (see below), whose sum is σ = 2686828032. Its totient is φ = 506442720.

The previous prime is 1272774331. The next prime is 1272774341. The reversal of 1272774340 is 434772721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272774340.

It is not an unprimeable number, because it can be changed into a prime (1272774341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162774 + ... + 170413.

It is an arithmetic number, because the mean of its divisors is an integer number (111951168).

Almost surely, 2^1272774340 is an apocalyptic number.

1272774340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272774340 is an abundant number, since it is smaller than the sum of its proper divisors (1414053692).

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

1272774340 is a wasteful number, since it uses less digits than its factorization.

1272774340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333387 (or 333385 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 1272774340 is about 35675.9630563773. The cubic root of 1272774340 is about 1083.7201215052.

The spelling of 1272774340 in words is "one billion, two hundred seventy-two million, seven hundred seventy-four thousand, three hundred forty".