1540871 has 2 divisors, whose sum is σ = 1540872. Its totient is φ = 1540870.

The previous prime is 1540867. The next prime is 1540873. The reversal of 1540871 is 1780451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540871 - 2² = 1540867 is a prime.

Together with 1540873, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1540871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770435 + 770436.

It is an arithmetic number, because the mean of its divisors is an integer number (770436).

2^1540871 is an apocalyptic number.

1540871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540871 is an equidigital number, since it uses as much as digits as its factorization.

1540871 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 26.

The square root of 1540871 is about 1241.3182508930. The cubic root of 1540871 is about 115.5018021620.

The spelling of 1540871 in words is "one million, five hundred forty thousand, eight hundred seventy-one".