1040432421 has 8 divisors (see below), whose sum is σ = 1585420864. Its totient is φ = 594532800.

The previous prime is 1040432413. The next prime is 1040432443. The reversal of 1040432421 is 1242340401.

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

It is not a de Polignac number, because 1040432421 - 2³ = 1040432413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 49544401 = 1040432421 / (1 + 0 + 4 + 0 + 4 + 3 + 2 + 4 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040432401) 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, 24772180 + ... + 24772221.

It is an arithmetic number, because the mean of its divisors is an integer number (198177608).

Almost surely, 2^1040432421 is an apocalyptic number.

It is an amenable number.

1040432421 is a deficient number, since it is larger than the sum of its proper divisors (544988443).

1040432421 is an equidigital number, since it uses as much as digits as its factorization.

1040432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49544411.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1040432421 is about 32255.7346994298. The cubic root of 1040432421 is about 1013.2998046842.

Adding to 1040432421 its reverse (1242340401), we get a palindrome (2282772822).

The spelling of 1040432421 in words is "one billion, forty million, four hundred thirty-two thousand, four hundred twenty-one".