1045612020 has 96 divisors (see below), whose sum is σ = 3030322176. Its totient is φ = 269107200.

The previous prime is 1045612003. The next prime is 1045612031. The reversal of 1045612020 is 202165401.

It is a congruent number.

It is an unprimeable number.

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, 1191822 + ... + 1192698.

It is an arithmetic number, because the mean of its divisors is an integer number (31565856).

Almost surely, 2^1045612020 is an apocalyptic number.

1045612020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1045612020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515161088).

1045612020 is an abundant number, since it is smaller than the sum of its proper divisors (1984710156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045612020 is a wasteful number, since it uses less digits than its factorization.

1045612020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1045612020 is about 32335.9246040685. The cubic root of 1045612020 is about 1014.9785301257.

Adding to 1045612020 its reverse (202165401), we get a palindrome (1247777421).

The spelling of 1045612020 in words is "one billion, forty-five million, six hundred twelve thousand, twenty".