1421509431 has 8 divisors (see below), whose sum is σ = 1902189424. Its totient is φ = 944251200.

The previous prime is 1421509429. The next prime is 1421509499. The reversal of 1421509431 is 1349051241.

1421509431 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1421509431 - 2¹ = 1421509429 is a prime.

It is a super-2 number, since 2×1421509431² = 4041378124843887522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421509631) 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, 854470 + ... + 856131.

It is an arithmetic number, because the mean of its divisors is an integer number (237773678).

Almost surely, 2^1421509431 is an apocalyptic number.

1421509431 is a deficient number, since it is larger than the sum of its proper divisors (480679993).

1421509431 is a wasteful number, since it uses less digits than its factorization.

1421509431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710881.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1421509431 is about 37702.9101131464. The cubic root of 1421509431 is about 1124.3889833616.

The spelling of 1421509431 in words is "one billion, four hundred twenty-one million, five hundred nine thousand, four hundred thirty-one".