1670551 has 2 divisors, whose sum is σ = 1670552. Its totient is φ = 1670550.

The previous prime is 1670533. The next prime is 1670561. The reversal of 1670551 is 1550761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1670551 - 2⁵ = 1670519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835275 + 835276.

It is an arithmetic number, because the mean of its divisors is an integer number (835276).

2^1670551 is an apocalyptic number.

1670551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670551 is an equidigital number, since it uses as much as digits as its factorization.

1670551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1670551 is about 1292.4979690506. The cubic root of 1670551 is about 118.6551464149.

The spelling of 1670551 in words is "one million, six hundred seventy thousand, five hundred fifty-one".