1540943 has 4 divisors (see below), whose sum is σ = 1544640. Its totient is φ = 1537248.

The previous prime is 1540927. The next prime is 1540949. The reversal of 1540943 is 3490451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1540943 - 2⁴ = 1540927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (386160).

2^1540943 is an apocalyptic number.

1540943 is a deficient number, since it is larger than the sum of its proper divisors (3697).

1540943 is an equidigital number, since it uses as much as digits as its factorization.

1540943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1540943 is about 1241.3472519807. The cubic root of 1540943 is about 115.5036011446.

The spelling of 1540943 in words is "one million, five hundred forty thousand, nine hundred forty-three".