3121542 has 48 divisors (see below), whose sum is σ = 7172880. Its totient is φ = 979776.

The previous prime is 3121519. The next prime is 3121543. The reversal of 3121542 is 2451213.

3121542 is a `hidden beast` number, since 3 + 121 + 542 = 666.

3121542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121543) 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 23 ways as a sum of consecutive naturals, for example, 28584 + ... + 28692.

It is an arithmetic number, because the mean of its divisors is an integer number (149435).

Almost surely, 2^3121542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3586440).

3121542 is an abundant number, since it is smaller than the sum of its proper divisors (4051338).

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

3121542 is a wasteful number, since it uses less digits than its factorization.

3121542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 194 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 3121542 is about 1766.7886121435. The cubic root of 3121542 is about 146.1469403229.

Adding to 3121542 its reverse (2451213), we get a palindrome (5572755).

It can be divided in two parts, 3121 and 542, that added together give a palindrome (3663).

The spelling of 3121542 in words is "three million, one hundred twenty-one thousand, five hundred forty-two".