42072361 has 4 divisors (see below), whose sum is σ = 43050832. Its totient is φ = 41093892.

The previous prime is 42072343. The next prime is 42072377. The reversal of 42072361 is 16327024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42072361 - 2¹⁵ = 42039593 is a prime.

It is a super-2 number, since 2×42072361² = 3540167120228642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42072311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489171 + ... + 489256.

It is an arithmetic number, because the mean of its divisors is an integer number (10762708).

Almost surely, 2^42072361 is an apocalyptic number.

It is an amenable number.

42072361 is a deficient number, since it is larger than the sum of its proper divisors (978471).

42072361 is an equidigital number, since it uses as much as digits as its factorization.

42072361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978470.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 42072361 is about 6486.3210682173. The cubic root of 42072361 is about 347.8021759575.

Adding to 42072361 its reverse (16327024), we get a palindrome (58399385).

The spelling of 42072361 in words is "forty-two million, seventy-two thousand, three hundred sixty-one".