1545542 has 4 divisors (see below), whose sum is σ = 2318316. Its totient is φ = 772770.

The previous prime is 1545539. The next prime is 1545547. The reversal of 1545542 is 2455451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2455451 = 137 ⋅17923.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386384 + ... + 386387.

It is an arithmetic number, because the mean of its divisors is an integer number (579579).

2^1545542 is an apocalyptic number.

1545542 is a deficient number, since it is larger than the sum of its proper divisors (772774).

1545542 is an equidigital number, since it uses as much as digits as its factorization.

1545542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772773.

The product of its digits is 4000, while the sum is 26.

The square root of 1545542 is about 1243.1982947221. The cubic root of 1545542 is about 115.6183952400.

Subtracting 1545542 from its reverse (2455451), we obtain a palindrome (909909).

The spelling of 1545542 in words is "one million, five hundred forty-five thousand, five hundred forty-two".