1542638 has 8 divisors (see below), whose sum is σ = 2342088. Its totient is φ = 761944.

The previous prime is 1542599. The next prime is 1542661. The reversal of 1542638 is 8362451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1542638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4481 + ... + 4812.

It is an arithmetic number, because the mean of its divisors is an integer number (292761).

2^1542638 is an apocalyptic number.

1542638 is a deficient number, since it is larger than the sum of its proper divisors (799450).

1542638 is an equidigital number, since it uses as much as digits as its factorization.

1542638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9378.

The product of its digits is 5760, while the sum is 29.

The square root of 1542638 is about 1242.0297903030. The cubic root of 1542638 is about 115.5459360144.

The spelling of 1542638 in words is "one million, five hundred forty-two thousand, six hundred thirty-eight".