1549986042 has 48 divisors (see below), whose sum is σ = 3422653920. Its totient is φ = 467591520.

The previous prime is 1549986013. The next prime is 1549986043. The reversal of 1549986042 is 2406899451.

It is a junction number, because it is equal to n+sod(n) for n = 1549985982 and 1549986000.

It is not an unprimeable number, because it can be changed into a prime (1549986043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161593 + ... + 170915.

It is an arithmetic number, because the mean of its divisors is an integer number (71305290).

Almost surely, 2^1549986042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1549986042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711326960).

1549986042 is an abundant number, since it is smaller than the sum of its proper divisors (1872667878).

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

1549986042 is a wasteful number, since it uses less digits than its factorization.

1549986042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579 (or 9568 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 1549986042 is about 39369.8621028827. The cubic root of 1549986042 is about 1157.2910533779.

The spelling of 1549986042 in words is "one billion, five hundred forty-nine million, nine hundred eighty-six thousand, forty-two".