1420835681 has 2 divisors, whose sum is σ = 1420835682. Its totient is φ = 1420835680.

The previous prime is 1420835659. The next prime is 1420835687. The reversal of 1420835681 is 1865380241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371961600 + 48874081 = 37040^2 + 6991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420835681 - 2²² = 1416641377 is a prime.

It is a super-2 number, since 2×1420835681² = 4037548064805467522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1420835687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710417840 + 710417841.

It is an arithmetic number, because the mean of its divisors is an integer number (710417841).

Almost surely, 2^1420835681 is an apocalyptic number.

It is an amenable number.

1420835681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420835681 is an equidigital number, since it uses as much as digits as its factorization.

1420835681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1420835681 is about 37693.9740674819. The cubic root of 1420835681 is about 1124.2113138181.

The spelling of 1420835681 in words is "one billion, four hundred twenty million, eight hundred thirty-five thousand, six hundred eighty-one".