1920049 has 2 divisors, whose sum is σ = 1920050. Its totient is φ = 1920048.

The previous prime is 1920043. The next prime is 1920089. The reversal of 1920049 is 9400291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 431649 = 1220^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920049 - 2¹³ = 1911857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1920043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960024 + 960025.

It is an arithmetic number, because the mean of its divisors is an integer number (960025).

2^1920049 is an apocalyptic number.

It is an amenable number.

1920049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920049 is an equidigital number, since it uses as much as digits as its factorization.

1920049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1920049 is about 1385.6583272943. The cubic root of 1920049 is about 124.2903575513.

The spelling of 1920049 in words is "one million, nine hundred twenty thousand, forty-nine".