1043261620 has 48 divisors (see below), whose sum is σ = 2254573440. Its totient is φ = 405212544.

The previous prime is 1043261587. The next prime is 1043261647. The reversal of 1043261620 is 261623401.

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 15 ways as a sum of consecutive naturals, for example, 477691 + ... + 479869.

It is an arithmetic number, because the mean of its divisors is an integer number (46970280).

Almost surely, 2^1043261620 is an apocalyptic number.

1043261620 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 1043261620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127286720).

1043261620 is an abundant number, since it is smaller than the sum of its proper divisors (1211311820).

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

1043261620 is a wasteful number, since it uses less digits than its factorization.

1043261620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872 (or 2870 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1043261620 is about 32299.5606781269. The cubic root of 1043261620 is about 1014.2174462700.

The spelling of 1043261620 in words is "one billion, forty-three million, two hundred sixty-one thousand, six hundred twenty".