1455731861 has 2 divisors, whose sum is σ = 1455731862. Its totient is φ = 1455731860.

The previous prime is 1455731843. The next prime is 1455731863. The reversal of 1455731861 is 1681375541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839202961 + 616528900 = 28969^2 + 24830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455731861 - 2²² = 1451537557 is a prime.

It is a super-2 number, since 2×1455731861² = 4238310502261046642, which contains 22 as substring.

Together with 1455731863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455731863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727865930 + 727865931.

It is an arithmetic number, because the mean of its divisors is an integer number (727865931).

Almost surely, 2^1455731861 is an apocalyptic number.

It is an amenable number.

1455731861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455731861 is an equidigital number, since it uses as much as digits as its factorization.

1455731861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 1455731861 is about 38154.0543192988. The cubic root of 1455731861 is about 1133.3406405430.

The spelling of 1455731861 in words is "one billion, four hundred fifty-five million, seven hundred thirty-one thousand, eight hundred sixty-one".