1420128973 has 2 divisors, whose sum is σ = 1420128974. Its totient is φ = 1420128972.

The previous prime is 1420128953. The next prime is 1420128979. The reversal of 1420128973 is 3798210241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1342636164 + 77492809 = 36642^2 + 8803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420128973 - 2⁹ = 1420128461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420128979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710064486 + 710064487.

It is an arithmetic number, because the mean of its divisors is an integer number (710064487).

Almost surely, 2^1420128973 is an apocalyptic number.

It is an amenable number.

1420128973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420128973 is an equidigital number, since it uses as much as digits as its factorization.

1420128973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1420128973 is about 37684.5986180031. The cubic root of 1420128973 is about 1124.0248928032.

The spelling of 1420128973 in words is "one billion, four hundred twenty million, one hundred twenty-eight thousand, nine hundred seventy-three".