1045556420 has 12 divisors (see below), whose sum is σ = 2195668524. Its totient is φ = 418222560.

The previous prime is 1045556419. The next prime is 1045556429. The reversal of 1045556420 is 246555401.

It can be written as a sum of positive squares in 2 ways, for example, as 748131904 + 297424516 = 27352^2 + 17246^2 .

It is not an unprimeable number, because it can be changed into a prime (1045556429) 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, 26138891 + ... + 26138930.

It is an arithmetic number, because the mean of its divisors is an integer number (182972377).

Almost surely, 2^1045556420 is an apocalyptic number.

1045556420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045556420 is an abundant number, since it is smaller than the sum of its proper divisors (1150112104).

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

1045556420 is a wasteful number, since it uses less digits than its factorization.

1045556420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52277830 (or 52277828 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1045556420 is about 32335.0648677253. The cubic root of 1045556420 is about 1014.9605394480.

The spelling of 1045556420 in words is "one billion, forty-five million, five hundred fifty-six thousand, four hundred twenty".