1271420987 has 8 divisors (see below), whose sum is σ = 1336826640. Its totient is φ = 1207452960.

The previous prime is 1271420977. The next prime is 1271420989. The reversal of 1271420987 is 7890241721.

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

It is a cyclic number.

It is not a de Polignac number, because 1271420987 - 2²⁸ = 1002985531 is a prime.

It is a super-2 number, since 2×1271420987² = 3233022652368108338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271420989) 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, 357593 + ... + 361130.

It is an arithmetic number, because the mean of its divisors is an integer number (167103330).

Almost surely, 2^1271420987 is an apocalyptic number.

1271420987 is a deficient number, since it is larger than the sum of its proper divisors (65405653).

1271420987 is an equidigital number, since it uses as much as digits as its factorization.

1271420987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718813.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 1271420987 is about 35656.9907171090. The cubic root of 1271420987 is about 1083.3358753287.

The spelling of 1271420987 in words is "one billion, two hundred seventy-one million, four hundred twenty thousand, nine hundred eighty-seven".