1055720505 has 16 divisors (see below), whose sum is σ = 1930460544. Its totient is φ = 482615040.

The previous prime is 1055720489. The next prime is 1055720507. The reversal of 1055720505 is 5050275501.

It is not a de Polignac number, because 1055720505 - 2⁴ = 1055720489 is a prime.

It is a super-2 number, since 2×1055720505² = 2229091569354910050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1055720507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5027136 + ... + 5027345.

It is an arithmetic number, because the mean of its divisors is an integer number (120653784).

Almost surely, 2^1055720505 is an apocalyptic number.

1055720505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055720505 is a deficient number, since it is larger than the sum of its proper divisors (874740039).

1055720505 is a wasteful number, since it uses less digits than its factorization.

1055720505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054496.

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 1055720505 is about 32491.8529019199. The cubic root of 1055720505 is about 1018.2388245359.

The spelling of 1055720505 in words is "one billion, fifty-five million, seven hundred twenty thousand, five hundred five".