1612147261 has 2 divisors, whose sum is σ = 1612147262. Its totient is φ = 1612147260.

The previous prime is 1612147253. The next prime is 1612147267. The reversal of 1612147261 is 1627412161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861716025 + 750431236 = 29355^2 + 27394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612147261 - 2³ = 1612147253 is a prime.

It is a super-2 number, since 2×1612147261² = 5198037582299604242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612147267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806073630 + 806073631.

It is an arithmetic number, because the mean of its divisors is an integer number (806073631).

Almost surely, 2^1612147261 is an apocalyptic number.

It is an amenable number.

1612147261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612147261 is an equidigital number, since it uses as much as digits as its factorization.

1612147261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1612147261 is about 40151.5536561165. The cubic root of 1612147261 is about 1172.5595367134.

The spelling of 1612147261 in words is "one billion, six hundred twelve million, one hundred forty-seven thousand, two hundred sixty-one".