1801542 has 16 divisors (see below), whose sum is σ = 3792960. Its totient is φ = 568872.

The previous prime is 1801531. The next prime is 1801549. The reversal of 1801542 is 2451081.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801549) 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, 7788 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (237060).

2^1801542 is an apocalyptic number.

1801542 is an abundant number, since it is smaller than the sum of its proper divisors (1991418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1801542 is a wasteful number, since it uses less digits than its factorization.

1801542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15827.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1801542 is about 1342.2153329477. The cubic root of 1801542 is about 121.6787661285.

The spelling of 1801542 in words is "one million, eight hundred one thousand, five hundred forty-two".