1272341897 has 24 divisors (see below), whose sum is σ = 1465668000. Its totient is φ = 1097608320.

The previous prime is 1272341891. The next prime is 1272341909. The reversal of 1272341897 is 7981432721.

It is not a de Polignac number, because 1272341897 - 2⁴ = 1272341881 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272341891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308354 + ... + 312452.

It is an arithmetic number, because the mean of its divisors is an integer number (61069500).

Almost surely, 2^1272341897 is an apocalyptic number.

1272341897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1272341897 is a deficient number, since it is larger than the sum of its proper divisors (193326103).

1272341897 is a wasteful number, since it uses less digits than its factorization.

1272341897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197 (or 4166 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 1272341897 is about 35669.9018361419. The cubic root of 1272341897 is about 1083.5973712129.

The spelling of 1272341897 in words is "one billion, two hundred seventy-two million, three hundred forty-one thousand, eight hundred ninety-seven".