1061605015 has 4 divisors (see below), whose sum is σ = 1273926024. Its totient is φ = 849284008.

The previous prime is 1061605009. The next prime is 1061605033. The reversal of 1061605015 is 5105061601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5105061601 = 53 ⋅96321917.

It is a cyclic number.

It is not a de Polignac number, because 1061605015 - 2¹⁵ = 1061572247 is a prime.

It is a super-2 number, since 2×1061605015² = 2254010415746300450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106160497 + ... + 106160506.

It is an arithmetic number, because the mean of its divisors is an integer number (318481506).

Almost surely, 2^1061605015 is an apocalyptic number.

1061605015 is a deficient number, since it is larger than the sum of its proper divisors (212321009).

1061605015 is an equidigital number, since it uses as much as digits as its factorization.

1061605015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212321008.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1061605015 is about 32582.2806905840. The cubic root of 1061605015 is about 1020.1271836154.

Adding to 1061605015 its reverse (5105061601), we get a palindrome (6166666616).

The spelling of 1061605015 in words is "one billion, sixty-one million, six hundred five thousand, fifteen".