1272840494 has 8 divisors (see below), whose sum is σ = 1913058000. Its totient is φ = 635154496.

The previous prime is 1272840487. The next prime is 1272840523. The reversal of 1272840494 is 4940482721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631619 + ... + 633630.

It is an arithmetic number, because the mean of its divisors is an integer number (239132250).

Almost surely, 2^1272840494 is an apocalyptic number.

1272840494 is a deficient number, since it is larger than the sum of its proper divisors (640217506).

1272840494 is a wasteful number, since it uses less digits than its factorization.

1272840494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265754.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1272840494 is about 35676.8901951950. The cubic root of 1272840494 is about 1083.7388970720.

The spelling of 1272840494 in words is "one billion, two hundred seventy-two million, eight hundred forty thousand, four hundred ninety-four".