1542823 has 2 divisors, whose sum is σ = 1542824. Its totient is φ = 1542822.

The previous prime is 1542811. The next prime is 1542841. The reversal of 1542823 is 3282451.

It is a weak prime.

It is an emirp because it is prime and its reverse (3282451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771411 + 771412.

It is an arithmetic number, because the mean of its divisors is an integer number (771412).

2^1542823 is an apocalyptic number.

1542823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542823 is an equidigital number, since it uses as much as digits as its factorization.

1542823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 1542823 is about 1242.1042629345. The cubic root of 1542823 is about 115.5505547570.

It can be divided in two parts, 15428 and 23, that added together give a palindrome (15451).

The spelling of 1542823 in words is "one million, five hundred forty-two thousand, eight hundred twenty-three".