1672749 has 36 divisors (see below), whose sum is σ = 2853396. Its totient is φ = 935424.

The previous prime is 1672747. The next prime is 1672751. The reversal of 1672749 is 9472761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1672747) and next prime (1672751).

It can be written as a sum of positive squares in 6 ways, for example, as 900 + 1671849 = 30^2 + 1293^2 .

It is not a de Polignac number, because 1672749 - 2¹ = 1672747 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672747) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57667 + ... + 57695.

It is an arithmetic number, because the mean of its divisors is an integer number (79261).

2^1672749 is an apocalyptic number.

It is an amenable number.

1672749 is a deficient number, since it is larger than the sum of its proper divisors (1180647).

1672749 is a wasteful number, since it uses less digits than its factorization.

1672749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 62 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 1672749 is about 1293.3479810167. The cubic root of 1672749 is about 118.7071631273.

It can be divided in two parts, 167 and 2749, that added together give a square (2916 = 54²).

The spelling of 1672749 in words is "one million, six hundred seventy-two thousand, seven hundred forty-nine".