40130421 has 16 divisors (see below), whose sum is σ = 57182400. Its totient is φ = 24945408.

The previous prime is 40130401. The next prime is 40130429. The reversal of 40130421 is 12403104.

It is not a de Polignac number, because 40130421 - 2⁹ = 40129909 is a prime.

It is a super-2 number, since 2×40130421² = 3220901379274482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40130421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40130429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1950 + ... + 9168.

It is an arithmetic number, because the mean of its divisors is an integer number (3573900).

Almost surely, 2^40130421 is an apocalyptic number.

It is an amenable number.

40130421 is a deficient number, since it is larger than the sum of its proper divisors (17051979).

40130421 is a wasteful number, since it uses less digits than its factorization.

40130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7348.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40130421 is about 6334.8576148166. The cubic root of 40130421 is about 342.3664807139.

Adding to 40130421 its reverse (12403104), we get a palindrome (52533525).

The spelling of 40130421 in words is "forty million, one hundred thirty thousand, four hundred twenty-one".