1421550769 has 2 divisors, whose sum is σ = 1421550770. Its totient is φ = 1421550768.

The previous prime is 1421550763. The next prime is 1421550817. The reversal of 1421550769 is 9670551241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1405350144 + 16200625 = 37488^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421550769 - 2¹⁵ = 1421518001 is a prime.

It is a super-2 number, since 2×1421550769² = 4041613177688982722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421550763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710775384 + 710775385.

It is an arithmetic number, because the mean of its divisors is an integer number (710775385).

Almost surely, 2^1421550769 is an apocalyptic number.

It is an amenable number.

1421550769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421550769 is an equidigital number, since it uses as much as digits as its factorization.

1421550769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1421550769 is about 37703.4583161810. The cubic root of 1421550769 is about 1124.3998824665.

The spelling of 1421550769 in words is "one billion, four hundred twenty-one million, five hundred fifty thousand, seven hundred sixty-nine".