1431872401 has 4 divisors (see below), whose sum is σ = 1431992304. Its totient is φ = 1431752500.

The previous prime is 1431872399. The next prime is 1431872417. The reversal of 1431872401 is 1042781341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1431872401 - 2¹ = 1431872399 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1431872801) 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, 39775 + ... + 66676.

It is an arithmetic number, because the mean of its divisors is an integer number (357998076).

Almost surely, 2^1431872401 is an apocalyptic number.

It is an amenable number.

1431872401 is a deficient number, since it is larger than the sum of its proper divisors (119903).

1431872401 is a wasteful number, since it uses less digits than its factorization.

1431872401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119902.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1431872401 is about 37840.0898651153. The cubic root of 1431872401 is about 1127.1146795676.

The spelling of 1431872401 in words is "one billion, four hundred thirty-one million, eight hundred seventy-two thousand, four hundred one".