1157545 has 8 divisors (see below), whose sum is σ = 1426824. Its totient is φ = 900864.

The previous prime is 1157539. The next prime is 1157557. The reversal of 1157545 is 5457511.

It can be written as a sum of positive squares in 4 ways, for example, as 700569 + 456976 = 837^2 + 676^2 .

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 1157545 - 2⁹ = 1157033 is a prime.

It is a Duffinian number.

1157545 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944 + ... + 3313.

It is an arithmetic number, because the mean of its divisors is an integer number (178353).

2^1157545 is an apocalyptic number.

It is an amenable number.

1157545 is a deficient number, since it is larger than the sum of its proper divisors (269279).

1157545 is an equidigital number, since it uses as much as digits as its factorization.

1157545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6299.

The product of its digits is 3500, while the sum is 28.

The square root of 1157545 is about 1075.8926526378. The cubic root of 1157545 is about 104.9975811990.

The spelling of 1157545 in words is "one million, one hundred fifty-seven thousand, five hundred forty-five".