73406421 has 12 divisors (see below), whose sum is σ = 115670880. Its totient is φ = 44488680.

The previous prime is 73406407. The next prime is 73406423. The reversal of 73406421 is 12460437.

It is not a de Polignac number, because 73406421 - 2⁷ = 73406293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73406423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370641 + ... + 370838.

It is an arithmetic number, because the mean of its divisors is an integer number (9639240).

Almost surely, 2^73406421 is an apocalyptic number.

It is an amenable number.

73406421 is a deficient number, since it is larger than the sum of its proper divisors (42264459).

73406421 is a wasteful number, since it uses less digits than its factorization.

73406421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741496 (or 741493 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 73406421 is about 8567.7547233800. The cubic root of 73406421 is about 418.7080880010.

Adding to 73406421 its reverse (12460437), we get a palindrome (85866858).

The spelling of 73406421 in words is "seventy-three million, four hundred six thousand, four hundred twenty-one".