1420164261 has 12 divisors (see below), whose sum is σ = 2058353388. Its totient is φ = 943543104.

The previous prime is 1420164257. The next prime is 1420164283. The reversal of 1420164261 is 1624610241.

1420164261 is a `hidden beast` number, since 14 + 2 + 0 + 1 + 642 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 899640036 + 520524225 = 29994^2 + 22815^2 .

It is not a de Polignac number, because 1420164261 - 2² = 1420164257 is a prime.

It is a super-2 number, since 2×1420164261² = 4033733056443352242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420164961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266640 + ... + 271913.

It is an arithmetic number, because the mean of its divisors is an integer number (171529449).

Almost surely, 2^1420164261 is an apocalyptic number.

It is an amenable number.

1420164261 is a deficient number, since it is larger than the sum of its proper divisors (638189127).

1420164261 is a wasteful number, since it uses less digits than its factorization.

1420164261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538852 (or 538849 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1420164261 is about 37685.0668169767. The cubic root of 1420164261 is about 1124.0342028172.

The spelling of 1420164261 in words is "one billion, four hundred twenty million, one hundred sixty-four thousand, two hundred sixty-one".