1351206143 has 4 divisors (see below), whose sum is σ = 1544235600. Its totient is φ = 1158176688.

The previous prime is 1351206137. The next prime is 1351206151. The reversal of 1351206143 is 3416021531.

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

It is a cyclic number.

It is not a de Polignac number, because 1351206143 - 2⁶ = 1351206079 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 (1351206113) 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, 96514718 + ... + 96514731.

It is an arithmetic number, because the mean of its divisors is an integer number (386058900).

Almost surely, 2^1351206143 is an apocalyptic number.

1351206143 is a deficient number, since it is larger than the sum of its proper divisors (193029457).

1351206143 is an equidigital number, since it uses as much as digits as its factorization.

1351206143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193029456.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1351206143 is about 36758.7560045222. The cubic root of 1351206143 is about 1105.5384974541.

Adding to 1351206143 its reverse (3416021531), we get a palindrome (4767227674).

The spelling of 1351206143 in words is "one billion, three hundred fifty-one million, two hundred six thousand, one hundred forty-three".