1598021 has 2 divisors, whose sum is σ = 1598022. Its totient is φ = 1598020.

The previous prime is 1598011. The next prime is 1598039. The reversal of 1598021 is 1208951.

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., 1221025 + 376996 = 1105^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1598021 - 2¹⁴ = 1581637 is a prime.

It is a super-2 number, since 2×1598021² = 5107342232882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1598011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799010 + 799011.

It is an arithmetic number, because the mean of its divisors is an integer number (799011).

2^1598021 is an apocalyptic number.

It is an amenable number.

1598021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598021 is an equidigital number, since it uses as much as digits as its factorization.

1598021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1598021 is about 1264.1285535894. The cubic root of 1598021 is about 116.9124677075.

The spelling of 1598021 in words is "one million, five hundred ninety-eight thousand, twenty-one".