1421131305 has 32 divisors (see below), whose sum is σ = 2517562368. Its totient is φ = 678744000.

The previous prime is 1421131301. The next prime is 1421131319. The reversal of 1421131305 is 5031311241.

It is not a de Polignac number, because 1421131305 - 2² = 1421131301 is a prime.

It is a super-2 number, since 2×1421131305² = 4039228372102006050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421131301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53221 + ... + 75330.

It is an arithmetic number, because the mean of its divisors is an integer number (78673824).

Almost surely, 2^1421131305 is an apocalyptic number.

1421131305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421131305 is a deficient number, since it is larger than the sum of its proper divisors (1096431063).

1421131305 is a wasteful number, since it uses less digits than its factorization.

1421131305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128637.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1421131305 is about 37697.8952330233. The cubic root of 1421131305 is about 1124.2892775130.

Adding to 1421131305 its reverse (5031311241), we get a palindrome (6452442546).

The spelling of 1421131305 in words is "one billion, four hundred twenty-one million, one hundred thirty-one thousand, three hundred five".