1090202261 has 4 divisors (see below), whose sum is σ = 1103337312. Its totient is φ = 1077067212.

The previous prime is 1090202251. The next prime is 1090202279. The reversal of 1090202261 is 1622020901.

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: 1622020901 = 47 ⋅34511083.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090202261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090202251) 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, 6567401 + ... + 6567566.

It is an arithmetic number, because the mean of its divisors is an integer number (275834328).

Almost surely, 2^1090202261 is an apocalyptic number.

It is an amenable number.

1090202261 is a deficient number, since it is larger than the sum of its proper divisors (13135051).

1090202261 is an equidigital number, since it uses as much as digits as its factorization.

1090202261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13135050.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1090202261 is about 33018.2110508731. The cubic root of 1090202261 is about 1029.2061187154.

The spelling of 1090202261 in words is "one billion, ninety million, two hundred two thousand, two hundred sixty-one".