1271067542 has 4 divisors (see below), whose sum is σ = 1906601316. Its totient is φ = 635533770.

The previous prime is 1271067493. The next prime is 1271067557. The reversal of 1271067542 is 2457601721.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1271067542² = 3231225392651843528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317766884 + ... + 317766887.

It is an arithmetic number, because the mean of its divisors is an integer number (476650329).

Almost surely, 2^1271067542 is an apocalyptic number.

1271067542 is a deficient number, since it is larger than the sum of its proper divisors (635533774).

1271067542 is an equidigital number, since it uses as much as digits as its factorization.

1271067542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635533773.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1271067542 is about 35652.0341916138. The cubic root of 1271067542 is about 1083.2354797506.

The spelling of 1271067542 in words is "one billion, two hundred seventy-one million, sixty-seven thousand, five hundred forty-two".