152461781 has 2 divisors, whose sum is σ = 152461782. Its totient is φ = 152461780.

The previous prime is 152461711. The next prime is 152461817. The reversal of 152461781 is 187164251.

Together with next prime (152461817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107972881 + 44488900 = 10391^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 152461781 - 2¹⁸ = 152199637 is a prime.

It is a super-2 number, since 2×152461781² = 46489189331383922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152461711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76230890 + 76230891.

It is an arithmetic number, because the mean of its divisors is an integer number (76230891).

Almost surely, 2^152461781 is an apocalyptic number.

It is an amenable number.

152461781 is a deficient number, since it is larger than the sum of its proper divisors (1).

152461781 is an equidigital number, since it uses as much as digits as its factorization.

152461781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 152461781 is about 12347.5414961846. The cubic root of 152461781 is about 534.2202295009.

The spelling of 152461781 in words is "one hundred fifty-two million, four hundred sixty-one thousand, seven hundred eighty-one".