42411721 has 8 divisors (see below), whose sum is σ = 46454688. Its totient is φ = 38400000.

The previous prime is 42411683. The next prime is 42411727. The reversal of 42411721 is 12711424.

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

It is a 5-Lehmer number, since φ(42411721) divides (42411721-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 42411721 - 2¹¹ = 42409673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42411692 and 42411701.

It is not an unprimeable number, because it can be changed into a prime (42411727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4920 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (5806836).

Almost surely, 2^42411721 is an apocalyptic number.

It is an amenable number.

42411721 is a deficient number, since it is larger than the sum of its proper divisors (4042967).

42411721 is a wasteful number, since it uses less digits than its factorization.

42411721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15623.

The product of its digits is 448, while the sum is 22.

The square root of 42411721 is about 6512.4281953815. The cubic root of 42411721 is about 348.7348089288.

The spelling of 42411721 in words is "forty-two million, four hundred eleven thousand, seven hundred twenty-one".