1157261 has 8 divisors (see below), whose sum is σ = 1365504. Its totient is φ = 959760.

The previous prime is 1157257. The next prime is 1157263. The reversal of 1157261 is 1627511.

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

It is not a de Polignac number, because 1157261 - 2² = 1157257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157263) 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, 2450 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (170688).

2^1157261 is an apocalyptic number.

It is an amenable number.

1157261 is a deficient number, since it is larger than the sum of its proper divisors (208243).

1157261 is an equidigital number, since it uses as much as digits as its factorization.

1157261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371.

The product of its digits is 420, while the sum is 23.

The square root of 1157261 is about 1075.7606611138. The cubic root of 1157261 is about 104.9889935553.

The spelling of 1157261 in words is "one million, one hundred fifty-seven thousand, two hundred sixty-one".