1941521 has 4 divisors (see below), whose sum is σ = 2008500. Its totient is φ = 1874544.

The previous prime is 1941517. The next prime is 1941547. The reversal of 1941521 is 1251491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1251491 = 101 ⋅12391.

It can be written as a sum of positive squares in 2 ways, for example, as 1500625 + 440896 = 1225^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941521 - 2² = 1941517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1941571) 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, 33446 + ... + 33503.

It is an arithmetic number, because the mean of its divisors is an integer number (502125).

2^1941521 is an apocalyptic number.

It is an amenable number.

1941521 is a deficient number, since it is larger than the sum of its proper divisors (66979).

1941521 is an equidigital number, since it uses as much as digits as its factorization.

1941521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66978.

The product of its digits is 360, while the sum is 23.

The square root of 1941521 is about 1393.3847279198. The cubic root of 1941521 is about 124.7519561194.

The spelling of 1941521 in words is "one million, nine hundred forty-one thousand, five hundred twenty-one".