1125655620 has 96 divisors (see below), whose sum is σ = 3211633152. Its totient is φ = 294524928.

The previous prime is 1125655603. The next prime is 1125655637. The reversal of 1125655620 is 265565211.

It is an interprime number because it is at equal distance from previous prime (1125655603) and next prime (1125655637).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1019989 + ... + 1021091.

It is an arithmetic number, because the mean of its divisors is an integer number (33454512).

Almost surely, 2^1125655620 is an apocalyptic number.

1125655620 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 1125655620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605816576).

1125655620 is an abundant number, since it is smaller than the sum of its proper divisors (2085977532).

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

1125655620 is a wasteful number, since it uses less digits than its factorization.

1125655620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1419 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1125655620 is about 33550.7916449076. The cubic root of 1125655620 is about 1040.2439085221.

The spelling of 1125655620 in words is "one billion, one hundred twenty-five million, six hundred fifty-five thousand, six hundred twenty".