1241661729 has 32 divisors (see below), whose sum is σ = 2067803136. Its totient is φ = 643849920.

The previous prime is 1241661721. The next prime is 1241661731. The reversal of 1241661729 is 9271661421.

It is not a de Polignac number, because 1241661729 - 2³ = 1241661721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1241661721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131019 + ... + 140175.

It is an arithmetic number, because the mean of its divisors is an integer number (64618848).

Almost surely, 2^1241661729 is an apocalyptic number.

It is an amenable number.

1241661729 is a deficient number, since it is larger than the sum of its proper divisors (826141407).

1241661729 is a wasteful number, since it uses less digits than its factorization.

1241661729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765.

The product of its digits is 36288, while the sum is 39.

The square root of 1241661729 is about 35237.2207899545. The cubic root of 1241661729 is about 1074.8167645866.

The spelling of 1241661729 in words is "one billion, two hundred forty-one million, six hundred sixty-one thousand, seven hundred twenty-nine".