1540949 has 2 divisors, whose sum is σ = 1540950. Its totient is φ = 1540948.

The previous prime is 1540927. The next prime is 1540961. The reversal of 1540949 is 9490451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1456849 + 84100 = 1207^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540949 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770474 + 770475.

It is an arithmetic number, because the mean of its divisors is an integer number (770475).

2^1540949 is an apocalyptic number.

It is an amenable number.

1540949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540949 is an equidigital number, since it uses as much as digits as its factorization.

1540949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1540949 is about 1241.3496687074. The cubic root of 1540949 is about 115.5037510573.

The spelling of 1540949 in words is "one million, five hundred forty thousand, nine hundred forty-nine".