1209157241 has 8 divisors (see below), whose sum is σ = 1230764640. Its totient is φ = 1187654688.

The previous prime is 1209157237. The next prime is 1209157267. The reversal of 1209157241 is 1427519021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1209157241 - 2² = 1209157237 is a prime.

It is a super-2 number, since 2×1209157241² = 2924122466925464162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209157198 and 1209157207.

It is not an unprimeable number, because it can be changed into a prime (1209157231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2756 + ... + 49253.

It is an arithmetic number, because the mean of its divisors is an integer number (153845580).

Almost surely, 2^1209157241 is an apocalyptic number.

It is an amenable number.

1209157241 is a deficient number, since it is larger than the sum of its proper divisors (21607399).

1209157241 is an equidigital number, since it uses as much as digits as its factorization.

1209157241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52423.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1209157241 is about 34772.9383429126. The cubic root of 1209157241 is about 1065.3547837498.

The spelling of 1209157241 in words is "one billion, two hundred nine million, one hundred fifty-seven thousand, two hundred forty-one".