1084265821 has 2 divisors, whose sum is σ = 1084265822. Its totient is φ = 1084265820.

The previous prime is 1084265783. The next prime is 1084265843. The reversal of 1084265821 is 1285624801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081423225 + 2842596 = 32885^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084265821 - 2¹¹ = 1084263773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084265881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542132910 + 542132911.

It is an arithmetic number, because the mean of its divisors is an integer number (542132911).

Almost surely, 2^1084265821 is an apocalyptic number.

It is an amenable number.

1084265821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084265821 is an equidigital number, since it uses as much as digits as its factorization.

1084265821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 1084265821 is about 32928.1918878034. The cubic root of 1084265821 is about 1027.3346177031.

The spelling of 1084265821 in words is "one billion, eighty-four million, two hundred sixty-five thousand, eight hundred twenty-one".