1157609 has 2 divisors, whose sum is σ = 1157610. Its totient is φ = 1157608.

The previous prime is 1157591. The next prime is 1157621. The reversal of 1157609 is 9067511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 157609 = 1000^2 + 397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157609 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1157669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578804 + 578805.

It is an arithmetic number, because the mean of its divisors is an integer number (578805).

2^1157609 is an apocalyptic number.

It is an amenable number.

1157609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157609 is an equidigital number, since it uses as much as digits as its factorization.

1157609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1157609 is about 1075.9223949709. The cubic root of 1157609 is about 104.9995162487. Note that the first 3 decimals are identical.

The spelling of 1157609 in words is "one million, one hundred fifty-seven thousand, six hundred nine".