1047045821 has 2 divisors, whose sum is σ = 1047045822. Its totient is φ = 1047045820.

The previous prime is 1047045817. The next prime is 1047045833. The reversal of 1047045821 is 1285407401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015123321 + 31922500 = 31861^2 + 5650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1047045821 - 2² = 1047045817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047045851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523522910 + 523522911.

It is an arithmetic number, because the mean of its divisors is an integer number (523522911).

Almost surely, 2^1047045821 is an apocalyptic number.

It is an amenable number.

1047045821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047045821 is an equidigital number, since it uses as much as digits as its factorization.

1047045821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1047045821 is about 32358.0874125774. The cubic root of 1047045821 is about 1015.4422497861.

The spelling of 1047045821 in words is "one billion, forty-seven million, forty-five thousand, eight hundred twenty-one".