1421531305 has 16 divisors (see below), whose sum is σ = 1754542080. Its totient is φ = 1104846912.

The previous prime is 1421531297. The next prime is 1421531311. The reversal of 1421531305 is 5031351241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1421531305 - 2³ = 1421531297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421531305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127672 + ... + 138358.

It is an arithmetic number, because the mean of its divisors is an integer number (109658880).

Almost surely, 2^1421531305 is an apocalyptic number.

It is an amenable number.

1421531305 is a deficient number, since it is larger than the sum of its proper divisors (333010775).

1421531305 is a wasteful number, since it uses less digits than its factorization.

1421531305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11448.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1421531305 is about 37703.2001957394. The cubic root of 1421531305 is about 1124.3947506486.

Adding to 1421531305 its reverse (5031351241), we get a palindrome (6452882546).

The spelling of 1421531305 in words is "one billion, four hundred twenty-one million, five hundred thirty-one thousand, three hundred five".