1420886821 has 2 divisors, whose sum is σ = 1420886822. Its totient is φ = 1420886820.

The previous prime is 1420886807. The next prime is 1420886827. The reversal of 1420886821 is 1286880241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1375593921 + 45292900 = 37089^2 + 6730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420886821 - 2¹³ = 1420878629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420886827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710443410 + 710443411.

It is an arithmetic number, because the mean of its divisors is an integer number (710443411).

Almost surely, 2^1420886821 is an apocalyptic number.

It is an amenable number.

1420886821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420886821 is an equidigital number, since it uses as much as digits as its factorization.

1420886821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 1420886821 is about 37694.6524191430. The cubic root of 1420886821 is about 1124.2248015323.

The spelling of 1420886821 in words is "one billion, four hundred twenty million, eight hundred eighty-six thousand, eight hundred twenty-one".