1045621 has 2 divisors, whose sum is σ = 1045622. Its totient is φ = 1045620.

The previous prime is 1045607. The next prime is 1045633. The reversal of 1045621 is 1265401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 171396 = 935^2 + 414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045621 - 2⁷ = 1045493 is a prime.

1045621 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522810 + 522811.

It is an arithmetic number, because the mean of its divisors is an integer number (522811).

2^1045621 is an apocalyptic number.

It is an amenable number.

1045621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045621 is an equidigital number, since it uses as much as digits as its factorization.

1045621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1045621 is about 1022.5561109299. The cubic root of 1045621 is about 101.4981435755.

The spelling of 1045621 in words is "one million, forty-five thousand, six hundred twenty-one".