1157047 has 4 divisors (see below), whose sum is σ = 1159200. Its totient is φ = 1154896.

The previous prime is 1157033. The next prime is 1157053. The reversal of 1157047 is 7407511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157047 is a prime.

It is an Ulam number.

It is a Duffinian number.

1157047 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498 + ... + 1600.

It is an arithmetic number, because the mean of its divisors is an integer number (289800).

2^1157047 is an apocalyptic number.

1157047 is a deficient number, since it is larger than the sum of its proper divisors (2153).

1157047 is a wasteful number, since it uses less digits than its factorization.

1157047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 1157047 is about 1075.6611920117. The cubic root of 1157047 is about 104.9825216561.

The spelling of 1157047 in words is "one million, one hundred fifty-seven thousand, forty-seven".