1540087 has 2 divisors, whose sum is σ = 1540088. Its totient is φ = 1540086.

The previous prime is 1540079. The next prime is 1540109. The reversal of 1540087 is 7800451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1540087 - 2³ = 1540079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770043 + 770044.

It is an arithmetic number, because the mean of its divisors is an integer number (770044).

2^1540087 is an apocalyptic number.

1540087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540087 is an equidigital number, since it uses as much as digits as its factorization.

1540087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1540087 is about 1241.0024174030. The cubic root of 1540087 is about 115.4822096122.

The spelling of 1540087 in words is "one million, five hundred forty thousand, eighty-seven".