213420742 has 8 divisors (see below), whose sum is σ = 320195232. Its totient is φ = 106689000.

The previous prime is 213420733. The next prime is 213420743. The reversal of 213420742 is 247024312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213420743) 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 3 ways as a sum of consecutive naturals, for example, 9192 + ... + 22612.

It is an arithmetic number, because the mean of its divisors is an integer number (40024404).

Almost surely, 2^213420742 is an apocalyptic number.

213420742 is a deficient number, since it is larger than the sum of its proper divisors (106774490).

213420742 is a wasteful number, since it uses less digits than its factorization.

213420742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21374.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 213420742 is about 14608.9267915203. The cubic root of 213420742 is about 597.6022287341.

The spelling of 213420742 in words is "two hundred thirteen million, four hundred twenty thousand, seven hundred forty-two".