1331061 has 4 divisors (see below), whose sum is σ = 1774752. Its totient is φ = 887372.

The previous prime is 1331059. The next prime is 1331063. The reversal of 1331061 is 1601331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1601331 = 3 ⋅533777.

It is an interprime number because it is at equal distance from previous prime (1331059) and next prime (1331063).

It is a cyclic number.

It is not a de Polignac number, because 1331061 - 2¹ = 1331059 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331063) 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, 221841 + ... + 221846.

It is an arithmetic number, because the mean of its divisors is an integer number (443688).

2^1331061 is an apocalyptic number.

It is an amenable number.

1331061 is a deficient number, since it is larger than the sum of its proper divisors (443691).

1331061 is an equidigital number, since it uses as much as digits as its factorization.

1331061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443690.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1331061 is about 1153.7161696015. The cubic root of 1331061 is about 110.0016804151.

Adding to 1331061 its reverse (1601331), we get a palindrome (2932392).

The spelling of 1331061 in words is "one million, three hundred thirty-one thousand, sixty-one".