1045511621 has 32 divisors (see below), whose sum is σ = 1378971648. Its totient is φ = 768493440.

The previous prime is 1045511591. The next prime is 1045511633. The reversal of 1045511621 is 1261155401.

It is not a de Polignac number, because 1045511621 - 2¹⁰ = 1045510597 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 (1045511681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125240 + ... + 133326.

It is an arithmetic number, because the mean of its divisors is an integer number (43092864).

Almost surely, 2^1045511621 is an apocalyptic number.

1045511621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1045511621 is a deficient number, since it is larger than the sum of its proper divisors (333460027).

1045511621 is a wasteful number, since it uses less digits than its factorization.

1045511621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1045511621 is about 32334.3721293610. The cubic root of 1045511621 is about 1014.9460432220.

The spelling of 1045511621 in words is "one billion, forty-five million, five hundred eleven thousand, six hundred twenty-one".