1431172261 has 2 divisors, whose sum is σ = 1431172262. Its totient is φ = 1431172260.

The previous prime is 1431172229. The next prime is 1431172291. The reversal of 1431172261 is 1622711341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189836036 + 241336225 = 34494^2 + 15535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431172261 - 2⁵ = 1431172229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431172291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715586130 + 715586131.

It is an arithmetic number, because the mean of its divisors is an integer number (715586131).

Almost surely, 2^1431172261 is an apocalyptic number.

It is an amenable number.

1431172261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431172261 is an equidigital number, since it uses as much as digits as its factorization.

1431172261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1431172261 is about 37830.8374345586. The cubic root of 1431172261 is about 1126.9309418902.

The spelling of 1431172261 in words is "one billion, four hundred thirty-one million, one hundred seventy-two thousand, two hundred sixty-one".