1165726437 has 16 divisors (see below), whose sum is σ = 1638750720. Its totient is φ = 735058800.

The previous prime is 1165726433. The next prime is 1165726439. The reversal of 1165726437 is 7346275611.

It is a happy number.

It is not a de Polignac number, because 1165726437 - 2² = 1165726433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165726433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19762 + ... + 52172.

It is an arithmetic number, because the mean of its divisors is an integer number (102421920).

Almost surely, 2^1165726437 is an apocalyptic number.

It is an amenable number.

1165726437 is a deficient number, since it is larger than the sum of its proper divisors (473024283).

1165726437 is a wasteful number, since it uses less digits than its factorization.

1165726437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33064.

The product of its digits is 211680, while the sum is 42.

The square root of 1165726437 is about 34142.7362260262. The cubic root of 1165726437 is about 1052.4437222388.

The spelling of 1165726437 in words is "one billion, one hundred sixty-five million, seven hundred twenty-six thousand, four hundred thirty-seven".