1157643 has 12 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 767376.

The previous prime is 1157641. The next prime is 1157669. The reversal of 1157643 is 3467511.

1157643 is a `hidden beast` number, since 1 + 15 + 7 + 643 = 666.

It is not a de Polignac number, because 1157643 - 2¹ = 1157641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2418 + ... + 2856.

It is an arithmetic number, because the mean of its divisors is an integer number (140140).

2^1157643 is an apocalyptic number.

1157643 is a deficient number, since it is larger than the sum of its proper divisors (524037).

1157643 is a wasteful number, since it uses less digits than its factorization.

1157643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 735 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1157643 is about 1075.9381952510. The cubic root of 1157643 is about 105.0005442149. Note that the first 3 decimals are identical.

The spelling of 1157643 in words is "one million, one hundred fifty-seven thousand, six hundred forty-three".