1133428621 has 8 divisors (see below), whose sum is σ = 1220950584. Its totient is φ = 1045954560.

The previous prime is 1133428619. The next prime is 1133428627. The reversal of 1133428621 is 1268243311.

It can be written as a sum of positive squares in 4 ways, for example, as 277222500 + 856206121 = 16650^2 + 29261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1133428621 - 2¹ = 1133428619 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 (1133428627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48525 + ... + 67981.

It is an arithmetic number, because the mean of its divisors is an integer number (152618823).

Almost surely, 2^1133428621 is an apocalyptic number.

It is an amenable number.

1133428621 is a deficient number, since it is larger than the sum of its proper divisors (87521963).

1133428621 is a wasteful number, since it uses less digits than its factorization.

1133428621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23951.

The product of its digits is 6912, while the sum is 31.

The square root of 1133428621 is about 33666.4316641963. The cubic root of 1133428621 is about 1042.6328204236.

The spelling of 1133428621 in words is "one billion, one hundred thirty-three million, four hundred twenty-eight thousand, six hundred twenty-one".