1271841987 has 8 divisors (see below), whose sum is σ = 1826234704. Its totient is φ = 782671968.

The previous prime is 1271841983. The next prime is 1271841997. The reversal of 1271841987 is 7891481721.

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

It is not a de Polignac number, because 1271841987 - 2² = 1271841983 is a prime.

It is a super-2 number, since 2×1271841987² = 3235164079792216338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271841983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16305628 + ... + 16305705.

It is an arithmetic number, because the mean of its divisors is an integer number (228279338).

Almost surely, 2^1271841987 is an apocalyptic number.

1271841987 is a deficient number, since it is larger than the sum of its proper divisors (554392717).

1271841987 is a wasteful number, since it uses less digits than its factorization.

1271841987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32611349.

The product of its digits is 225792, while the sum is 48.

The square root of 1271841987 is about 35662.8936991938. The cubic root of 1271841987 is about 1083.4554355365.

The spelling of 1271841987 in words is "one billion, two hundred seventy-one million, eight hundred forty-one thousand, nine hundred eighty-seven".