1061265555 has 24 divisors (see below), whose sum is σ = 2102317152. Its totient is φ = 485149824.

The previous prime is 1061265497. The next prime is 1061265571. The reversal of 1061265555 is 5555621601.

It is not a de Polignac number, because 1061265555 - 2⁸ = 1061265299 is a prime.

It is a super-2 number, since 2×1061265555² = 2252569156458916050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1684234 + ... + 1684863.

It is an arithmetic number, because the mean of its divisors is an integer number (87596548).

Almost surely, 2^1061265555 is an apocalyptic number.

1061265555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1061265555 is a deficient number, since it is larger than the sum of its proper divisors (1041051597).

1061265555 is a wasteful number, since it uses less digits than its factorization.

1061265555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369115 (or 3369112 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1061265555 is about 32577.0710009356. The cubic root of 1061265555 is about 1020.0184396897.

It can be divided in two parts, 10612 and 65555, that added together give a palindrome (76167).

The spelling of 1061265555 in words is "one billion, sixty-one million, two hundred sixty-five thousand, five hundred fifty-five".