40730421 has 4 divisors (see below), whose sum is σ = 54307232. Its totient is φ = 27153612.

The previous prime is 40730411. The next prime is 40730429. The reversal of 40730421 is 12403704.

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 not a de Polignac number, because 40730421 - 2⁷ = 40730293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40730429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6788401 + ... + 6788406.

It is an arithmetic number, because the mean of its divisors is an integer number (13576808).

Almost surely, 2^40730421 is an apocalyptic number.

It is an amenable number.

40730421 is a deficient number, since it is larger than the sum of its proper divisors (13576811).

40730421 is a wasteful number, since it uses less digits than its factorization.

40730421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13576810.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40730421 is about 6382.0389375183. The cubic root of 40730421 is about 344.0643161022.

The spelling of 40730421 in words is "forty million, seven hundred thirty thousand, four hundred twenty-one".