1059775921 has 4 divisors (see below), whose sum is σ = 1060773952. Its totient is φ = 1058777892.

The previous prime is 1059775919. The next prime is 1059775933. The reversal of 1059775921 is 1295779501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1295779501 = 43 ⋅30134407.

It is a cyclic number.

It is not a de Polignac number, because 1059775921 - 2¹ = 1059775919 is a prime.

It is a super-2 number, since 2×1059775921² = 2246250005462796482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1059775621) 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, 497421 + ... + 499546.

It is an arithmetic number, because the mean of its divisors is an integer number (265193488).

Almost surely, 2^1059775921 is an apocalyptic number.

It is an amenable number.

1059775921 is a deficient number, since it is larger than the sum of its proper divisors (998031).

1059775921 is an equidigital number, since it uses as much as digits as its factorization.

1059775921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998030.

The product of its (nonzero) digits is 198450, while the sum is 46.

The square root of 1059775921 is about 32554.1997444262. The cubic root of 1059775921 is about 1019.5409702452.

It can be divided in two parts, 1059775 and 921, that added together give a triangular number (1060696 = T₁₄₅₆).

The spelling of 1059775921 in words is "one billion, fifty-nine million, seven hundred seventy-five thousand, nine hundred twenty-one".