5642121 has 4 divisors (see below), whose sum is σ = 7522832. Its totient is φ = 3761412.

The previous prime is 5642099. The next prime is 5642191. The reversal of 5642121 is 1212465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5642121 - 2⁶ = 5642057 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5642191) 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 3 ways as a sum of consecutive naturals, for example, 940351 + ... + 940356.

It is an arithmetic number, because the mean of its divisors is an integer number (1880708).

Almost surely, 2^5642121 is an apocalyptic number.

It is an amenable number.

5642121 is a deficient number, since it is larger than the sum of its proper divisors (1880711).

5642121 is a wasteful number, since it uses less digits than its factorization.

5642121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880710.

The product of its digits is 480, while the sum is 21.

The square root of 5642121 is about 2375.3149264887. The cubic root of 5642121 is about 178.0249197111.

Adding to 5642121 its reverse (1212465), we get a palindrome (6854586).

The spelling of 5642121 in words is "five million, six hundred forty-two thousand, one hundred twenty-one".