1545442 has 4 divisors (see below), whose sum is σ = 2318166. Its totient is φ = 772720.

The previous prime is 1545433. The next prime is 1545449. The reversal of 1545442 is 2445451.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1442401 + 103041 = 1201^2 + 321^2 .

It is not an unprimeable number, because it can be changed into a prime (1545449) 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, 386359 + ... + 386362.

2^1545442 is an apocalyptic number.

1545442 is a deficient number, since it is larger than the sum of its proper divisors (772724).

1545442 is an equidigital number, since it uses as much as digits as its factorization.

1545442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772723.

The product of its digits is 3200, while the sum is 25.

The square root of 1545442 is about 1243.1580752262. The cubic root of 1545442 is about 115.6159015972.

Subtracting 1545442 from its reverse (2445451), we obtain a palindrome (900009).

The spelling of 1545442 in words is "one million, five hundred forty-five thousand, four hundred forty-two".