1271123493 has 16 divisors (see below), whose sum is σ = 1741719360. Its totient is φ = 824000256.

The previous prime is 1271123489. The next prime is 1271123549. The reversal of 1271123493 is 3943211721.

It is not a de Polignac number, because 1271123493 - 2² = 1271123489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271123423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270621 + ... + 275277.

It is an arithmetic number, because the mean of its divisors is an integer number (108857460).

Almost surely, 2^1271123493 is an apocalyptic number.

It is an amenable number.

1271123493 is a deficient number, since it is larger than the sum of its proper divisors (470595867).

1271123493 is a wasteful number, since it uses less digits than its factorization.

1271123493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156.

The product of its digits is 9072, while the sum is 33.

The square root of 1271123493 is about 35652.8188647125. The cubic root of 1271123493 is about 1083.2513737969.

The spelling of 1271123493 in words is "one billion, two hundred seventy-one million, one hundred twenty-three thousand, four hundred ninety-three".