1431403421 has 4 divisors (see below), whose sum is σ = 1635889632. Its totient is φ = 1226917212.

The previous prime is 1431403409. The next prime is 1431403429. The reversal of 1431403421 is 1243041341.

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 a cyclic number.

It is not a de Polignac number, because 1431403421 - 2²² = 1427209117 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 (1431403429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102243095 + ... + 102243108.

It is an arithmetic number, because the mean of its divisors is an integer number (408972408).

Almost surely, 2^1431403421 is an apocalyptic number.

It is an amenable number.

1431403421 is a deficient number, since it is larger than the sum of its proper divisors (204486211).

1431403421 is an equidigital number, since it uses as much as digits as its factorization.

1431403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204486210.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1431403421 is about 37833.8924907285. The cubic root of 1431403421 is about 1126.9916118132.

Adding to 1431403421 its reverse (1243041341), we get a palindrome (2674444762).

The spelling of 1431403421 in words is "one billion, four hundred thirty-one million, four hundred three thousand, four hundred twenty-one".