1542403 has 4 divisors (see below), whose sum is σ = 1609488. Its totient is φ = 1475320.

The previous prime is 1542383. The next prime is 1542421. The reversal of 1542403 is 3042451.

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 1542403 - 2¹⁷ = 1411331 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 (1542433) 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, 33508 + ... + 33553.

It is an arithmetic number, because the mean of its divisors is an integer number (402372).

2^1542403 is an apocalyptic number.

1542403 is a deficient number, since it is larger than the sum of its proper divisors (67085).

1542403 is an equidigital number, since it uses as much as digits as its factorization.

1542403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67084.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1542403 is about 1241.9351834939. The cubic root of 1542403 is about 115.5400684304.

Adding to 1542403 its reverse (3042451), we get a palindrome (4584854).

The spelling of 1542403 in words is "one million, five hundred forty-two thousand, four hundred three".