1675649 has 4 divisors (see below), whose sum is σ = 1733460. Its totient is φ = 1617840.

The previous prime is 1675637. The next prime is 1675679. The reversal of 1675649 is 9465761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9465761 = 139 ⋅68099.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 552049 = 1060^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1675649 - 2⁸ = 1675393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1675679) 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, 28862 + ... + 28919.

It is an arithmetic number, because the mean of its divisors is an integer number (433365).

2^1675649 is an apocalyptic number.

It is an amenable number.

1675649 is a deficient number, since it is larger than the sum of its proper divisors (57811).

1675649 is an equidigital number, since it uses as much as digits as its factorization.

1675649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57810.

The product of its digits is 45360, while the sum is 38.

The square root of 1675649 is about 1294.4686168463. The cubic root of 1675649 is about 118.7757233287.

It can be divided in two parts, 1675 and 649, that multiplied together give a triangular number (1087075 = T₁₄₇₄).

The spelling of 1675649 in words is "one million, six hundred seventy-five thousand, six hundred forty-nine".