1241591988 has 144 divisors (see below), whose sum is σ = 3692122560. Its totient is φ = 321785856.

The previous prime is 1241591983. The next prime is 1241592007. The reversal of 1241591988 is 8891951421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241591983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 449620 + ... + 452372.

It is an arithmetic number, because the mean of its divisors is an integer number (25639740).

Almost surely, 2^1241591988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1241591988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846061280).

1241591988 is an abundant number, since it is smaller than the sum of its proper divisors (2450530572).

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

1241591988 is a wasteful number, since it uses less digits than its factorization.

1241591988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846 (or 2837 counting only the distinct ones).

The product of its digits is 207360, while the sum is 48.

The square root of 1241591988 is about 35236.2311832580. The cubic root of 1241591988 is about 1074.7966409631.

The spelling of 1241591988 in words is "one billion, two hundred forty-one million, five hundred ninety-one thousand, nine hundred eighty-eight".