1381972143 has 16 divisors (see below), whose sum is σ = 1954562400. Its totient is φ = 865545216.

The previous prime is 1381972133. The next prime is 1381972159. The reversal of 1381972143 is 3412791831.

It is not a de Polignac number, because 1381972143 - 2⁴ = 1381972127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381972133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4083 + ... + 52731.

It is an arithmetic number, because the mean of its divisors is an integer number (122160150).

Almost surely, 2^1381972143 is an apocalyptic number.

1381972143 is a deficient number, since it is larger than the sum of its proper divisors (572590257).

1381972143 is a wasteful number, since it uses less digits than its factorization.

1381972143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49226.

The product of its digits is 36288, while the sum is 39.

The square root of 1381972143 is about 37174.8859177806. The cubic root of 1381972143 is about 1113.8663813406.

The spelling of 1381972143 in words is "one billion, three hundred eighty-one million, nine hundred seventy-two thousand, one hundred forty-three".