40673421 has 10 divisors (see below), whose sum is σ = 60759182. Its totient is φ = 27115560.

The previous prime is 40673393. The next prime is 40673441. The reversal of 40673421 is 12437604.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 14356521 = 5130^2 + 3789^2 .

It is not a de Polignac number, because 40673421 - 2⁵ = 40673389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40673441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 250990 + ... + 251151.

Almost surely, 2^40673421 is an apocalyptic number.

It is an amenable number.

40673421 is a deficient number, since it is larger than the sum of its proper divisors (20085761).

40673421 is an equidigital number, since it uses as much as digits as its factorization.

40673421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502153 (or 502144 counting only the distinct ones).

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

The square root of 40673421 is about 6377.5717165705. The cubic root of 40673421 is about 343.9037414331.

The spelling of 40673421 in words is "forty million, six hundred seventy-three thousand, four hundred twenty-one".