1940621 has 2 divisors, whose sum is σ = 1940622. Its totient is φ = 1940620.

The previous prime is 1940599. The next prime is 1940639. The reversal of 1940621 is 1260491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 784996 = 1075^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940621 - 2⁶ = 1940557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970310 + 970311.

It is an arithmetic number, because the mean of its divisors is an integer number (970311).

2^1940621 is an apocalyptic number.

It is an amenable number.

1940621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940621 is an equidigital number, since it uses as much as digits as its factorization.

1940621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1940621 is about 1393.0617358897. The cubic root of 1940621 is about 124.7326767136.

The spelling of 1940621 in words is "one million, nine hundred forty thousand, six hundred twenty-one".