73542021 has 8 divisors (see below), whose sum is σ = 112064064. Its totient is φ = 42024000.

The previous prime is 73541953. The next prime is 73542043. The reversal of 73542021 is 12024537.

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

It is not a de Polignac number, because 73542021 - 2¹⁴ = 73525637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73541982 and 73542000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73542061) 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, 1750980 + ... + 1751021.

It is an arithmetic number, because the mean of its divisors is an integer number (14008008).

Almost surely, 2^73542021 is an apocalyptic number.

It is an amenable number.

73542021 is a deficient number, since it is larger than the sum of its proper divisors (38522043).

73542021 is a wasteful number, since it uses less digits than its factorization.

73542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502011.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 73542021 is about 8575.6644640518. The cubic root of 73542021 is about 418.9657488953.

Adding to 73542021 its reverse (12024537), we get a palindrome (85566558).

The spelling of 73542021 in words is "seventy-three million, five hundred forty-two thousand, twenty-one".