1361221871 has 8 divisors (see below), whose sum is σ = 1375661760. Its totient is φ = 1346855328.

The previous prime is 1361221867. The next prime is 1361221877. The reversal of 1361221871 is 1781221631.

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 1361221871 - 2² = 1361221867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361221877) 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, 19385 + ... + 55661.

It is an arithmetic number, because the mean of its divisors is an integer number (171957720).

Almost surely, 2^1361221871 is an apocalyptic number.

1361221871 is a deficient number, since it is larger than the sum of its proper divisors (14439889).

1361221871 is a wasteful number, since it uses less digits than its factorization.

1361221871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36673.

The product of its digits is 4032, while the sum is 32.

The square root of 1361221871 is about 36894.7404246188. The cubic root of 1361221871 is about 1108.2633533947.

The spelling of 1361221871 in words is "one billion, three hundred sixty-one million, two hundred twenty-one thousand, eight hundred seventy-one".