1421530531 has 4 divisors (see below), whose sum is σ = 1505149992. Its totient is φ = 1337911072.

The previous prime is 1421530427. The next prime is 1421530549. The reversal of 1421530531 is 1350351241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421530531 - 2⁷ = 1421530403 is a prime.

It is a super-2 number, since 2×1421530531² = 4041498101130283922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421530496 and 1421530505.

It is not an unprimeable number, because it can be changed into a prime (1421530931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41809705 + ... + 41809738.

It is an arithmetic number, because the mean of its divisors is an integer number (376287498).

Almost surely, 2^1421530531 is an apocalyptic number.

1421530531 is a deficient number, since it is larger than the sum of its proper divisors (83619461).

1421530531 is an equidigital number, since it uses as much as digits as its factorization.

1421530531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83619460.

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

The square root of 1421530531 is about 37703.1899313573. The cubic root of 1421530531 is about 1124.3945465772.

Adding to 1421530531 its reverse (1350351241), we get a palindrome (2771881772).

The spelling of 1421530531 in words is "one billion, four hundred twenty-one million, five hundred thirty thousand, five hundred thirty-one".