1601091 has 12 divisors (see below), whose sum is σ = 2369640. Its totient is φ = 1041120.

The previous prime is 1601071. The next prime is 1601107. The reversal of 1601091 is 1901061.

It is not a de Polignac number, because 1601091 - 2⁵ = 1601059 is a prime.

1601091 is a strobogrammatic number because it is the same when read upside-down.

1601091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1601051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (197470).

2^1601091 is an apocalyptic number.

1601091 is a deficient number, since it is larger than the sum of its proper divisors (768549).

1601091 is a wasteful number, since it uses less digits than its factorization.

1601091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386 (or 4383 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1601091 is about 1265.3422461927. The cubic root of 1601091 is about 116.9872876830.

The spelling of 1601091 in words is "one million, six hundred one thousand, ninety-one".