1542891 has 8 divisors (see below), whose sum is σ = 2351104. Its totient is φ = 881640.

The previous prime is 1542889. The next prime is 1542899. The reversal of 1542891 is 1982451.

It is a happy number.

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

It is not a de Polignac number, because 1542891 - 2¹ = 1542889 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1542899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36715 + ... + 36756.

It is an arithmetic number, because the mean of its divisors is an integer number (293888).

2^1542891 is an apocalyptic number.

1542891 is a deficient number, since it is larger than the sum of its proper divisors (808213).

1542891 is an equidigital number, since it uses as much as digits as its factorization.

1542891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73481.

The product of its digits is 2880, while the sum is 30.

The square root of 1542891 is about 1242.1316355363. The cubic root of 1542891 is about 115.5522523642.

It can be divided in two parts, 154289 and 1, that added together give a triangular number (154290 = T₅₅₅).

The spelling of 1542891 in words is "one million, five hundred forty-two thousand, eight hundred ninety-one".