1420090181 has 2 divisors, whose sum is σ = 1420090182. Its totient is φ = 1420090180.

The previous prime is 1420090171. The next prime is 1420090237. The reversal of 1420090181 is 1810900241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 195720100 = 34991^2 + 13990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420090181 - 2¹⁰ = 1420089157 is a prime.

It is a super-2 number, since 2×1420090181² = 4033312244345225522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1420090181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420090151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710045090 + 710045091.

It is an arithmetic number, because the mean of its divisors is an integer number (710045091).

Almost surely, 2^1420090181 is an apocalyptic number.

It is an amenable number.

1420090181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420090181 is an equidigital number, since it uses as much as digits as its factorization.

1420090181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1420090181 is about 37684.0839214648. The cubic root of 1420090181 is about 1124.0146581528.

The spelling of 1420090181 in words is "one billion, four hundred twenty million, ninety thousand, one hundred eighty-one".