1420134221 has 4 divisors (see below), whose sum is σ = 1549237344. Its totient is φ = 1291031100.

The previous prime is 1420134173. The next prime is 1420134239. The reversal of 1420134221 is 1224310241.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420134221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420134193 and 1420134202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420134251) 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, 64551545 + ... + 64551566.

It is an arithmetic number, because the mean of its divisors is an integer number (387309336).

Almost surely, 2^1420134221 is an apocalyptic number.

1420134221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1420134221 is a deficient number, since it is larger than the sum of its proper divisors (129103123).

1420134221 is a wasteful number, since it uses less digits than its factorization.

1420134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129103122.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1420134221 is about 37684.6682485066. The cubic root of 1420134221 is about 1124.0262773900.

Adding to 1420134221 its reverse (1224310241), we get a palindrome (2644444462).

The spelling of 1420134221 in words is "one billion, four hundred twenty million, one hundred thirty-four thousand, two hundred twenty-one".