1272383290 has 16 divisors (see below), whose sum is σ = 2290696200. Its totient is φ = 508863040.

The previous prime is 1272383257. The next prime is 1272383303. The reversal of 1272383290 is 923832721.

It can be written as a sum of positive squares in 4 ways, for example, as 376398801 + 895984489 = 19401^2 + 29933^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103680 + ... + 115300.

Almost surely, 2^1272383290 is an apocalyptic number.

1272383290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272383290 is a deficient number, since it is larger than the sum of its proper divisors (1018312910).

1272383290 is a wasteful number, since it uses less digits than its factorization.

1272383290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22577.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1272383290 is about 35670.4820544943. The cubic root of 1272383290 is about 1083.6091219485.

The spelling of 1272383290 in words is "one billion, two hundred seventy-two million, three hundred eighty-three thousand, two hundred ninety".