42651729 has 12 divisors (see below), whose sum is σ = 64286976. Its totient is φ = 27198072.

The previous prime is 42651727. The next prime is 42651757. The reversal of 42651729 is 92715624.

It is not a de Polignac number, because 42651729 - 2¹ = 42651727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42651693 and 42651702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42651727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102817 + ... + 103230.

It is an arithmetic number, because the mean of its divisors is an integer number (5357248).

Almost surely, 2^42651729 is an apocalyptic number.

It is an amenable number.

42651729 is a deficient number, since it is larger than the sum of its proper divisors (21635247).

42651729 is a wasteful number, since it uses less digits than its factorization.

42651729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206076 (or 206073 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 42651729 is about 6530.8291204104. The cubic root of 42651729 is about 349.3914022166.

The spelling of 42651729 in words is "forty-two million, six hundred fifty-one thousand, seven hundred twenty-nine".