1421505434 has 24 divisors (see below), whose sum is σ = 2208451860. Its totient is φ = 686206080.

The previous prime is 1421505431. The next prime is 1421505443. The reversal of 1421505434 is 4345051241.

It can be written as a sum of positive squares in 2 ways, for example, as 1354019209 + 67486225 = 36797^2 + 8215^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1421505397 and 1421505406.

It is not an unprimeable number, because it can be changed into a prime (1421505431) 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 11 ways as a sum of consecutive naturals, for example, 1408322 + ... + 1409330.

Almost surely, 2^1421505434 is an apocalyptic number.

1421505434 is a deficient number, since it is larger than the sum of its proper divisors (786946426).

1421505434 is a wasteful number, since it uses less digits than its factorization.

1421505434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1421505434 is about 37702.8571065907. The cubic root of 1421505434 is about 1124.3879295084.

Adding to 1421505434 its reverse (4345051241), we get a palindrome (5766556675).

The spelling of 1421505434 in words is "one billion, four hundred twenty-one million, five hundred five thousand, four hundred thirty-four".