1670617 has 4 divisors (see below), whose sum is σ = 1799140. Its totient is φ = 1542096.

The previous prime is 1670597. The next prime is 1670623. The reversal of 1670617 is 7160761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7160761 = 107 ⋅66923.

It can be written as a sum of positive squares in 2 ways, for example, as 741321 + 929296 = 861^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670617 - 2⁷ = 1670489 is a prime.

It is a super-2 number, since 2×1670617² = 5581922321378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670657) 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, 64242 + ... + 64267.

It is an arithmetic number, because the mean of its divisors is an integer number (449785).

2^1670617 is an apocalyptic number.

It is an amenable number.

1670617 is a deficient number, since it is larger than the sum of its proper divisors (128523).

1670617 is a wasteful number, since it uses less digits than its factorization.

1670617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128522.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1670617 is about 1292.5235007535. The cubic root of 1670617 is about 118.6567090005.

The spelling of 1670617 in words is "one million, six hundred seventy thousand, six hundred seventeen".