1421204531 has 2 divisors, whose sum is σ = 1421204532. Its totient is φ = 1421204530.

The previous prime is 1421204509. The next prime is 1421204563. The reversal of 1421204531 is 1354021241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421204531 - 2⁶ = 1421204467 is a prime.

It is a super-2 number, since 2×1421204531² = 4039644637869859922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421204497 and 1421204506.

It is not a weakly prime, because it can be changed into another prime (1421204501) 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 as a sum of consecutive naturals, namely, 710602265 + 710602266.

It is an arithmetic number, because the mean of its divisors is an integer number (710602266).

Almost surely, 2^1421204531 is an apocalyptic number.

1421204531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421204531 is an equidigital number, since it uses as much as digits as its factorization.

1421204531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1421204531 is about 37698.8664418441. The cubic root of 1421204531 is about 1124.3085874324.

Adding to 1421204531 its reverse (1354021241), we get a palindrome (2775225772).

The spelling of 1421204531 in words is "one billion, four hundred twenty-one million, two hundred four thousand, five hundred thirty-one".