1061556101 has 4 divisors (see below), whose sum is σ = 1074993600. Its totient is φ = 1048118604.

The previous prime is 1061556091. The next prime is 1061556103. The reversal of 1061556101 is 1016551601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1061556101 - 2¹⁸ = 1061293957 is a prime.

It is a super-2 number, since 2×1061556101² = 2253802711140644402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061556103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6718631 + ... + 6718788.

It is an arithmetic number, because the mean of its divisors is an integer number (268748400).

Almost surely, 2^1061556101 is an apocalyptic number.

It is an amenable number.

1061556101 is a deficient number, since it is larger than the sum of its proper divisors (13437499).

1061556101 is an equidigital number, since it uses as much as digits as its factorization.

1061556101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13437498.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1061556101 is about 32581.5300592222. The cubic root of 1061556101 is about 1020.1115157456. Note that the first 3 decimals are identical.

The spelling of 1061556101 in words is "one billion, sixty-one million, five hundred fifty-six thousand, one hundred one".