1671155 has 4 divisors (see below), whose sum is σ = 2005392. Its totient is φ = 1336920.

The previous prime is 1671139. The next prime is 1671161. The reversal of 1671155 is 5511761.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1671155 - 2⁴ = 1671139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167111 + ... + 167120.

It is an arithmetic number, because the mean of its divisors is an integer number (501348).

2^1671155 is an apocalyptic number.

1671155 is a deficient number, since it is larger than the sum of its proper divisors (334237).

1671155 is an equidigital number, since it uses as much as digits as its factorization.

1671155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334236.

The product of its digits is 1050, while the sum is 26.

The square root of 1671155 is about 1292.7316040076. The cubic root of 1671155 is about 118.6694449054.

Subtracting 1671155 from its reverse (5511761), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1671155 in words is "one million, six hundred seventy-one thousand, one hundred fifty-five".