72642043 has 4 divisors (see below), whose sum is σ = 72962280. Its totient is φ = 72321808.

The previous prime is 72642041. The next prime is 72642061. The reversal of 72642043 is 34024627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72642043 - 2¹ = 72642041 is a prime.

It is a super-2 number, since 2×72642043² = 10553732822427698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72642041) 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, 159778 + ... + 160231.

It is an arithmetic number, because the mean of its divisors is an integer number (18240570).

Almost surely, 2^72642043 is an apocalyptic number.

72642043 is a deficient number, since it is larger than the sum of its proper divisors (320237).

72642043 is a wasteful number, since it uses less digits than its factorization.

72642043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320236.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 72642043 is about 8523.0301536484. The cubic root of 72642043 is about 417.2496841747.

The spelling of 72642043 in words is "seventy-two million, six hundred forty-two thousand, forty-three".