1540073 has 2 divisors, whose sum is σ = 1540074. Its totient is φ = 1540072.

The previous prime is 1540039. The next prime is 1540079. The reversal of 1540073 is 3700451.

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., 779689 + 760384 = 883^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540073 - 2⁶ = 1540009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770036 + 770037.

It is an arithmetic number, because the mean of its divisors is an integer number (770037).

2^1540073 is an apocalyptic number.

It is an amenable number.

1540073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540073 is an equidigital number, since it uses as much as digits as its factorization.

1540073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1540073 is about 1240.9967767887. The cubic root of 1540073 is about 115.4818596849.

The spelling of 1540073 in words is "one million, five hundred forty thousand, seventy-three".