1601131 has 4 divisors (see below), whose sum is σ = 1829872. Its totient is φ = 1372392.

The previous prime is 1601123. The next prime is 1601137. The reversal of 1601131 is 1311061.

It is a happy number.

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

It is not a de Polignac number, because 1601131 - 2³ = 1601123 is a prime.

It is a super-2 number, since 2×1601131² = 5127240958322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601137) 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, 114360 + ... + 114373.

It is an arithmetic number, because the mean of its divisors is an integer number (457468).

2^1601131 is an apocalyptic number.

1601131 is a deficient number, since it is larger than the sum of its proper divisors (228741).

1601131 is an equidigital number, since it uses as much as digits as its factorization.

1601131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228740.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1601131 is about 1265.3580520943. The cubic root of 1601131 is about 116.9882619047.

Adding to 1601131 its reverse (1311061), we get a palindrome (2912192).

The spelling of 1601131 in words is "one million, six hundred one thousand, one hundred thirty-one".