1601303161 has 4 divisors (see below), whose sum is σ = 1602046324. Its totient is φ = 1600560000.

The previous prime is 1601303153. The next prime is 1601303167. The reversal of 1601303161 is 1613031061.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 542191225 + 1059111936 = 23285^2 + 32544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601303161 - 2³ = 1601303153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601303167) 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, 368340 + ... + 372661.

It is an arithmetic number, because the mean of its divisors is an integer number (400511581).

Almost surely, 2^1601303161 is an apocalyptic number.

It is an amenable number.

1601303161 is a deficient number, since it is larger than the sum of its proper divisors (743163).

1601303161 is an equidigital number, since it uses as much as digits as its factorization.

1601303161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743162.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1601303161 is about 40016.2861969973. The cubic root of 1601303161 is about 1169.9245479382.

The spelling of 1601303161 in words is "one billion, six hundred one million, three hundred three thousand, one hundred sixty-one".