1241121520 has 20 divisors (see below), whose sum is σ = 2885607720. Its totient is φ = 496448576.

The previous prime is 1241121509. The next prime is 1241121547. The reversal of 1241121520 is 251211421.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1241121520² = 3080765254814220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7756930 + ... + 7757089.

It is an arithmetic number, because the mean of its divisors is an integer number (144280386).

Almost surely, 2^1241121520 is an apocalyptic number.

1241121520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1241121520 is an abundant number, since it is smaller than the sum of its proper divisors (1644486200).

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

1241121520 is a wasteful number, since it uses less digits than its factorization.

1241121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514032 (or 15514026 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1241121520 is about 35229.5546381160. The cubic root of 1241121520 is about 1074.6608686877.

Adding to 1241121520 its reverse (251211421), we get a palindrome (1492332941).

The spelling of 1241121520 in words is "one billion, two hundred forty-one million, one hundred twenty-one thousand, five hundred twenty".