1601157 has 4 divisors (see below), whose sum is σ = 2134880. Its totient is φ = 1067436.

The previous prime is 1601147. The next prime is 1601161. The reversal of 1601157 is 7511061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1601157 - 2⁸ = 1600901 is a prime.

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 (1601107) 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, 266857 + ... + 266862.

It is an arithmetic number, because the mean of its divisors is an integer number (533720).

2^1601157 is an apocalyptic number.

It is an amenable number.

1601157 is a deficient number, since it is larger than the sum of its proper divisors (533723).

1601157 is an equidigital number, since it uses as much as digits as its factorization.

1601157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533722.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 1601157 is about 1265.3683258245. The cubic root of 1601157 is about 116.9888951401.

The spelling of 1601157 in words is "one million, six hundred one thousand, one hundred fifty-seven".