1421867761 has 2 divisors, whose sum is σ = 1421867762. Its totient is φ = 1421867760.

The previous prime is 1421867653. The next prime is 1421867773. The reversal of 1421867761 is 1677681241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1392707761 + 29160000 = 37319^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421867761 - 2¹¹ = 1421865713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421868761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710933880 + 710933881.

It is an arithmetic number, because the mean of its divisors is an integer number (710933881).

Almost surely, 2^1421867761 is an apocalyptic number.

It is an amenable number.

1421867761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421867761 is an equidigital number, since it uses as much as digits as its factorization.

1421867761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 43.

The square root of 1421867761 is about 37707.6618341684. The cubic root of 1421867761 is about 1124.4834530022.

The spelling of 1421867761 in words is "one billion, four hundred twenty-one million, eight hundred sixty-seven thousand, seven hundred sixty-one".