1601967 has 4 divisors (see below), whose sum is σ = 2135960. Its totient is φ = 1067976.

The previous prime is 1601953. The next prime is 1601969. The reversal of 1601967 is 7691061.

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

It is not a de Polignac number, because 1601967 - 2⁸ = 1601711 is a prime.

It is a super-3 number, since 3×1601967³ = 12333375417713094189, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601969) 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, 266992 + ... + 266997.

It is an arithmetic number, because the mean of its divisors is an integer number (533990).

2^1601967 is an apocalyptic number.

1601967 is a deficient number, since it is larger than the sum of its proper divisors (533993).

1601967 is an equidigital number, since it uses as much as digits as its factorization.

1601967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533992.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1601967 is about 1265.6883502664. The cubic root of 1601967 is about 117.0086194249.

The spelling of 1601967 in words is "one million, six hundred one thousand, nine hundred sixty-seven".