1421511449 has 4 divisors (see below), whose sum is σ = 1421681664. Its totient is φ = 1421341236.

The previous prime is 1421511383. The next prime is 1421511503. The reversal of 1421511449 is 9441151241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9441151241 = 42379 ⋅222779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421511449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421511149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71897 + ... + 89510.

It is an arithmetic number, because the mean of its divisors is an integer number (355420416).

Almost surely, 2^1421511449 is an apocalyptic number.

It is an amenable number.

1421511449 is a deficient number, since it is larger than the sum of its proper divisors (170215).

1421511449 is an equidigital number, since it uses as much as digits as its factorization.

1421511449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170214.

The product of its digits is 5760, while the sum is 32.

The square root of 1421511449 is about 37702.9368749969. The cubic root of 1421511449 is about 1124.3895154289.

The spelling of 1421511449 in words is "one billion, four hundred twenty-one million, five hundred eleven thousand, four hundred forty-nine".