1061252305 has 4 divisors (see below), whose sum is σ = 1273502772. Its totient is φ = 849001840.

The previous prime is 1061252299. The next prime is 1061252321. The reversal of 1061252305 is 5032521601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5032521601 = 23 ⋅218805287.

It can be written as a sum of positive squares in 2 ways, for example, as 336942736 + 724309569 = 18356^2 + 26913^2 .

It is not a de Polignac number, because 1061252305 - 2¹⁷ = 1061121233 is a prime.

It is a super-2 number, since 2×1061252305² = 2252512909735626050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061252305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106125226 + ... + 106125235.

It is an arithmetic number, because the mean of its divisors is an integer number (318375693).

Almost surely, 2^1061252305 is an apocalyptic number.

It is an amenable number.

1061252305 is a deficient number, since it is larger than the sum of its proper divisors (212250467).

1061252305 is an equidigital number, since it uses as much as digits as its factorization.

1061252305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212250466.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1061252305 is about 32576.8676364073. The cubic root of 1061252305 is about 1020.0141946634.

Adding to 1061252305 its reverse (5032521601), we get a palindrome (6093773906).

The spelling of 1061252305 in words is "one billion, sixty-one million, two hundred fifty-two thousand, three hundred five".