1321402143 has 8 divisors (see below), whose sum is σ = 1762049968. Its totient is φ = 880844544.

The previous prime is 1321402123. The next prime is 1321402151. The reversal of 1321402143 is 3412041231.

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

It is not a de Polignac number, because 1321402143 - 2¹⁰ = 1321401119 is a prime.

It is a super-2 number, since 2×1321402143² = 3492207247049984898, 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 (1321402123) 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, 27471 + ... + 58287.

It is an arithmetic number, because the mean of its divisors is an integer number (220256246).

Almost surely, 2^1321402143 is an apocalyptic number.

1321402143 is a deficient number, since it is larger than the sum of its proper divisors (440647825).

1321402143 is a wasteful number, since it uses less digits than its factorization.

1321402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45113.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1321402143 is about 36351.0954855559. The cubic root of 1321402143 is about 1097.3495812795.

Adding to 1321402143 its reverse (3412041231), we get a palindrome (4733443374).

The spelling of 1321402143 in words is "one billion, three hundred twenty-one million, four hundred two thousand, one hundred forty-three".