1545543 has 12 divisors (see below), whose sum is σ = 2260440. Its totient is φ = 1017456.

The previous prime is 1545539. The next prime is 1545547. The reversal of 1545543 is 3455451.

It is an interprime number because it is at equal distance from previous prime (1545539) and next prime (1545547).

It is not a de Polignac number, because 1545543 - 2² = 1545539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (188370).

2^1545543 is an apocalyptic number.

1545543 is a deficient number, since it is larger than the sum of its proper divisors (714897).

1545543 is a wasteful number, since it uses less digits than its factorization.

1545543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2155 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 1545543 is about 1243.1986969105. The cubic root of 1545543 is about 115.6184201759.

The spelling of 1545543 in words is "one million, five hundred forty-five thousand, five hundred forty-three".