1157623 has 4 divisors (see below), whose sum is σ = 1170720. Its totient is φ = 1144528.

The previous prime is 1157621. The next prime is 1157627. The reversal of 1157623 is 3267511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3267511 = 13 ⋅251347.

It is a cyclic number.

It is not a de Polignac number, because 1157623 - 2¹ = 1157621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157621) 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, 6415 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (292680).

2^1157623 is an apocalyptic number.

1157623 is a deficient number, since it is larger than the sum of its proper divisors (13097).

1157623 is an equidigital number, since it uses as much as digits as its factorization.

1157623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096.

The product of its digits is 1260, while the sum is 25.

The square root of 1157623 is about 1075.9289009967. The cubic root of 1157623 is about 104.9999395313. Note that the first 4 decimals are identical.

The spelling of 1157623 in words is "one million, one hundred fifty-seven thousand, six hundred twenty-three".