42221756 has 12 divisors (see below), whose sum is σ = 74428368. Its totient is φ = 20956512.

The previous prime is 42221749. The next prime is 42221771. The reversal of 42221756 is 65712224.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37976 + ... + 39071.

It is an arithmetic number, because the mean of its divisors is an integer number (6202364).

Almost surely, 2^42221756 is an apocalyptic number.

It is an amenable number.

42221756 is a deficient number, since it is larger than the sum of its proper divisors (32206612).

42221756 is a wasteful number, since it uses less digits than its factorization.

42221756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77188 (or 77186 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 42221756 is about 6497.8270213972. The cubic root of 42221756 is about 348.2133605951.

The spelling of 42221756 in words is "forty-two million, two hundred twenty-one thousand, seven hundred fifty-six".