1271406447 has 24 divisors (see below), whose sum is σ = 1879939776. Its totient is φ = 827629056.

The previous prime is 1271406431. The next prime is 1271406457. The reversal of 1271406447 is 7446041721.

It is a happy number.

1271406447 is a `hidden beast` number, since 1 + 2 + 7 + 1 + 4 + 0 + 644 + 7 = 666.

It is not a de Polignac number, because 1271406447 - 2⁴ = 1271406431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271406407) 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, 190023 + ... + 196599.

It is an arithmetic number, because the mean of its divisors is an integer number (78330824).

Almost surely, 2^1271406447 is an apocalyptic number.

1271406447 is a deficient number, since it is larger than the sum of its proper divisors (608533329).

1271406447 is a wasteful number, since it uses less digits than its factorization.

1271406447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7087 (or 7084 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 1271406447 is about 35656.7868294382. The cubic root of 1271406447 is about 1083.3317456282.

The spelling of 1271406447 in words is "one billion, two hundred seventy-one million, four hundred six thousand, four hundred forty-seven".