1598749 has 4 divisors (see below), whose sum is σ = 1625020. Its totient is φ = 1572480.

The previous prime is 1598743. The next prime is 1598767. The reversal of 1598749 is 9478951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9478951 = 101 ⋅93851.

It can be written as a sum of positive squares in 2 ways, for example, as 260100 + 1338649 = 510^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1598749 - 2⁹ = 1598237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1598743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13044 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (406255).

2^1598749 is an apocalyptic number.

It is an amenable number.

1598749 is a deficient number, since it is larger than the sum of its proper divisors (26271).

1598749 is an equidigital number, since it uses as much as digits as its factorization.

1598749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26270.

The product of its digits is 90720, while the sum is 43.

The square root of 1598749 is about 1264.4164662009. The cubic root of 1598749 is about 116.9302186955.

The spelling of 1598749 in words is "one million, five hundred ninety-eight thousand, seven hundred forty-nine".