1011942500 has 60 divisors (see below), whose sum is σ = 2309260800. Its totient is φ = 387156000.

The previous prime is 1011942497. The next prime is 1011942511. The reversal of 1011942500 is 52491101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48701 + ... + 66299.

It is an arithmetic number, because the mean of its divisors is an integer number (38487680).

Almost surely, 2^1011942500 is an apocalyptic number.

1011942500 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 1011942500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154630400).

1011942500 is an abundant number, since it is smaller than the sum of its proper divisors (1297318300).

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

1011942500 is a wasteful number, since it uses less digits than its factorization.

1011942500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17646 (or 17629 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1011942500 is about 31811.0436798292. The cubic root of 1011942500 is about 1003.9650906101.

The spelling of 1011942500 in words is "one billion, eleven million, nine hundred forty-two thousand, five hundred".