1421243131 has 32 divisors (see below), whose sum is σ = 1805147136. Its totient is φ = 1095969600.

The previous prime is 1421243123. The next prime is 1421243137. The reversal of 1421243131 is 1313421241.

It is not a de Polignac number, because 1421243131 - 2³ = 1421243123 is a prime.

It is a super-3 number, since 3×1421243131³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421243137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 958911 + ... + 960391.

It is an arithmetic number, because the mean of its divisors is an integer number (56410848).

Almost surely, 2^1421243131 is an apocalyptic number.

1421243131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421243131 is a deficient number, since it is larger than the sum of its proper divisors (383904005).

1421243131 is a wasteful number, since it uses less digits than its factorization.

1421243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1602 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1421243131 is about 37699.3783901008. The cubic root of 1421243131 is about 1124.3187661030.

Adding to 1421243131 its reverse (1313421241), we get a palindrome (2734664372).

The spelling of 1421243131 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, one hundred thirty-one".