42721802 has 8 divisors (see below), whose sum is σ = 64211616. Its totient is φ = 21317932.

The previous prime is 42721801. The next prime is 42721849. The reversal of 42721802 is 20812724.

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

It is a super-2 number, since 2×42721802² = 3650304732254408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42721801) 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, 20228 + ... + 22239.

It is an arithmetic number, because the mean of its divisors is an integer number (8026452).

Almost surely, 2^42721802 is an apocalyptic number.

42721802 is a deficient number, since it is larger than the sum of its proper divisors (21489814).

42721802 is a wasteful number, since it uses less digits than its factorization.

42721802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42972.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 42721802 is about 6536.1917046549. The cubic root of 42721802 is about 349.5826372011.

The spelling of 42721802 in words is "forty-two million, seven hundred twenty-one thousand, eight hundred two".