1618542 has 40 divisors (see below), whose sum is σ = 3699696. Its totient is φ = 528768.

The previous prime is 1618537. The next prime is 1618549. The reversal of 1618542 is 2458161.

1618542 is a `hidden beast` number, since 1 + 618 + 5 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15663 + ... + 15765.

2^1618542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849848).

1618542 is an abundant number, since it is smaller than the sum of its proper divisors (2081154).

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

1618542 is a wasteful number, since it uses less digits than its factorization.

1618542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 205 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1618542 is about 1272.2193207148. The cubic root of 1618542 is about 117.4107848509.

The spelling of 1618542 in words is "one million, six hundred eighteen thousand, five hundred forty-two".