42763721 has 48 divisors (see below), whose sum is σ = 62052480. Its totient is φ = 28869120.

The previous prime is 42763681. The next prime is 42763729. The reversal of 42763721 is 12736724.

It is not a de Polignac number, because 42763721 - 2¹⁰ = 42762697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42763729) 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 47 ways as a sum of consecutive naturals, for example, 118940 + ... + 119298.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^42763721 is an apocalyptic number.

It is an amenable number.

42763721 is a deficient number, since it is larger than the sum of its proper divisors (19288759).

42763721 is a wasteful number, since it uses less digits than its factorization.

42763721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 407 counting only the distinct ones).

The product of its digits is 14112, while the sum is 32.

The square root of 42763721 is about 6539.3976022261. The cubic root of 42763721 is about 349.6969376564.

It can be divided in two parts, 4276 and 3721, that added together give a palindrome (7997).

The spelling of 42763721 in words is "forty-two million, seven hundred sixty-three thousand, seven hundred twenty-one".