1404432421 has 16 divisors (see below), whose sum is σ = 1661464576. Its totient is φ = 1162014336.

The previous prime is 1404432397. The next prime is 1404432433. The reversal of 1404432421 is 1242344041.

It is not a de Polignac number, because 1404432421 - 2¹¹ = 1404430373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404432461) 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, 11545 + ... + 54241.

It is an arithmetic number, because the mean of its divisors is an integer number (103841536).

Almost surely, 2^1404432421 is an apocalyptic number.

It is an amenable number.

1404432421 is a deficient number, since it is larger than the sum of its proper divisors (257032155).

1404432421 is a wasteful number, since it uses less digits than its factorization.

1404432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42868.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1404432421 is about 37475.7577775287. The cubic root of 1404432421 is about 1119.8682936644.

Adding to 1404432421 its reverse (1242344041), we get a palindrome (2646776462).

The spelling of 1404432421 in words is "one billion, four hundred four million, four hundred thirty-two thousand, four hundred twenty-one".