1090545621 has 32 divisors (see below), whose sum is σ = 1708646400. Its totient is φ = 611793600.

The previous prime is 1090545607. The next prime is 1090545689. The reversal of 1090545621 is 1265450901.

It is not a de Polignac number, because 1090545621 - 2¹⁰ = 1090544597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090545601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355 + ... + 46703.

It is an arithmetic number, because the mean of its divisors is an integer number (53395200).

Almost surely, 2^1090545621 is an apocalyptic number.

1090545621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1090545621 is a deficient number, since it is larger than the sum of its proper divisors (618100779).

1090545621 is a wasteful number, since it uses less digits than its factorization.

1090545621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46417.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1090545621 is about 33023.4101964046. The cubic root of 1090545621 is about 1029.3141571141.

The spelling of 1090545621 in words is "one billion, ninety million, five hundred forty-five thousand, six hundred twenty-one".