1670429 has 4 divisors (see below), whose sum is σ = 1728060. Its totient is φ = 1612800.

The previous prime is 1670419. The next prime is 1670447. The reversal of 1670429 is 9240761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9240761 = 1901 ⋅4861.

It can be written as a sum of positive squares in 2 ways, for example, as 1435204 + 235225 = 1198^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670429 - 2⁴ = 1670413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 57601 = 1670429 / (1 + 6 + 7 + 0 + 4 + 2 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28772 + ... + 28829.

It is an arithmetic number, because the mean of its divisors is an integer number (432015).

2^1670429 is an apocalyptic number.

It is an amenable number.

1670429 is a deficient number, since it is larger than the sum of its proper divisors (57631).

1670429 is an equidigital number, since it uses as much as digits as its factorization.

1670429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57630.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1670429 is about 1292.4507727569. The cubic root of 1670429 is about 118.6522578909.

It can be divided in two parts, 16704 and 29, that multiplied together give a square (484416 = 696²).

The spelling of 1670429 in words is "one million, six hundred seventy thousand, four hundred twenty-nine".