1431728101 has 4 divisors (see below), whose sum is σ = 1431873900. Its totient is φ = 1431582304.

The previous prime is 1431728069. The next prime is 1431728107. The reversal of 1431728101 is 1018271341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1018271341 = 23 ⋅44272667.

It can be written as a sum of positive squares in 2 ways, for example, as 311487201 + 1120240900 = 17649^2 + 33470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431728101 - 2⁵ = 1431728069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1431728101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431728107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57016 + ... + 78193.

It is an arithmetic number, because the mean of its divisors is an integer number (357968475).

Almost surely, 2^1431728101 is an apocalyptic number.

It is an amenable number.

1431728101 is a deficient number, since it is larger than the sum of its proper divisors (145799).

1431728101 is a wasteful number, since it uses less digits than its factorization.

1431728101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145798.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1431728101 is about 37838.1831091293. The cubic root of 1431728101 is about 1127.0768158325.

Adding to 1431728101 its reverse (1018271341), we get a palindrome (2449999442).

The spelling of 1431728101 in words is "one billion, four hundred thirty-one million, seven hundred twenty-eight thousand, one hundred one".