73740521 has 8 divisors (see below), whose sum is σ = 75096384. Its totient is φ = 72389520.

The previous prime is 73740517. The next prime is 73740551. The reversal of 73740521 is 12504737.

73740521 = T₁₉ + T₂₀ + ... + T₇₆₁.

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

It is a cyclic number.

It is not a de Polignac number, because 73740521 - 2² = 73740517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73740551) 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, 44510 + ... + 46136.

It is an arithmetic number, because the mean of its divisors is an integer number (9387048).

Almost surely, 2^73740521 is an apocalyptic number.

It is an amenable number.

73740521 is a deficient number, since it is larger than the sum of its proper divisors (1355863).

73740521 is a wasteful number, since it uses less digits than its factorization.

73740521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 73740521 is about 8587.2301122073. The cubic root of 73740521 is about 419.3423589282.

The spelling of 73740521 in words is "seventy-three million, seven hundred forty thousand, five hundred twenty-one".