1241688145 has 4 divisors (see below), whose sum is σ = 1490025780. Its totient is φ = 993350512.

The previous prime is 1241688137. The next prime is 1241688179. The reversal of 1241688145 is 5418861421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 838160401 + 403527744 = 28951^2 + 20088^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241688145 - 2³ = 1241688137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1241688098 and 1241688107.

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, 124168810 + ... + 124168819.

It is an arithmetic number, because the mean of its divisors is an integer number (372506445).

Almost surely, 2^1241688145 is an apocalyptic number.

It is an amenable number.

1241688145 is a deficient number, since it is larger than the sum of its proper divisors (248337635).

1241688145 is an equidigital number, since it uses as much as digits as its factorization.

1241688145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248337634.

The product of its digits is 61440, while the sum is 40.

The square root of 1241688145 is about 35237.5956188841. The cubic root of 1241688145 is about 1074.8243866728.

The spelling of 1241688145 in words is "one billion, two hundred forty-one million, six hundred eighty-eight thousand, one hundred forty-five".