42301721 has 12 divisors (see below), whose sum is σ = 53140416. Its totient is φ = 32961720.

The previous prime is 42301711. The next prime is 42301741. The reversal of 42301721 is 12710324.

42301721 = T₄₈₆ + T₄₈₇ + ... + T₇₁₆.

It is a de Polignac number, because none of the positive numbers 2^k-42301721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42301693 and 42301702.

It is not an unprimeable number, because it can be changed into a prime (42301711) 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, 24125 + ... + 25818.

It is an arithmetic number, because the mean of its divisors is an integer number (4428368).

Almost surely, 2^42301721 is an apocalyptic number.

It is an amenable number.

42301721 is a deficient number, since it is larger than the sum of its proper divisors (10838695).

42301721 is a wasteful number, since it uses less digits than its factorization.

42301721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49972 (or 49961 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 42301721 is about 6503.9773216087. The cubic root of 42301721 is about 348.4330523982.

The spelling of 42301721 in words is "forty-two million, three hundred one thousand, seven hundred twenty-one".