1355771671 has 4 divisors (see below), whose sum is σ = 1362870144. Its totient is φ = 1348673200.

The previous prime is 1355771633. The next prime is 1355771699. The reversal of 1355771671 is 1761775531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1761775531 = 197 ⋅8943023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355771671 is a prime.

It is a super-2 number, since 2×1355771671² = 3676233647772264482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355771171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548950 + ... + 3549331.

It is an arithmetic number, because the mean of its divisors is an integer number (340717536).

Almost surely, 2^1355771671 is an apocalyptic number.

1355771671 is a deficient number, since it is larger than the sum of its proper divisors (7098473).

1355771671 is an equidigital number, since it uses as much as digits as its factorization.

1355771671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7098472.

The product of its digits is 154350, while the sum is 43.

The square root of 1355771671 is about 36820.8048662709. The cubic root of 1355771671 is about 1106.7822486678.

The spelling of 1355771671 in words is "one billion, three hundred fifty-five million, seven hundred seventy-one thousand, six hundred seventy-one".