1597949 has 4 divisors (see below), whose sum is σ = 1691964. Its totient is φ = 1503936.

The previous prime is 1597943. The next prime is 1597951. The reversal of 1597949 is 9497951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9497951 = 17 ⋅558703.

It can be written as a sum of positive squares in 2 ways, for example, as 1452025 + 145924 = 1205^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597949 - 2⁸ = 1597693 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 (1597943) 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, 46982 + ... + 47015.

It is an arithmetic number, because the mean of its divisors is an integer number (422991).

2^1597949 is an apocalyptic number.

It is an amenable number.

1597949 is a deficient number, since it is larger than the sum of its proper divisors (94015).

1597949 is an equidigital number, since it uses as much as digits as its factorization.

1597949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94014.

The product of its digits is 102060, while the sum is 44.

The square root of 1597949 is about 1264.1000751523. The cubic root of 1597949 is about 116.9107118223.

The spelling of 1597949 in words is "one million, five hundred ninety-seven thousand, nine hundred forty-nine".