1125629669 has 4 divisors (see below), whose sum is σ = 1141483680. Its totient is φ = 1109775660.

The previous prime is 1125629663. The next prime is 1125629699. The reversal of 1125629669 is 9669265211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9669265211 = 31 ⋅311911781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125629669 is a prime.

It is a super-2 number, since 2×1125629669² = 2534084303466099122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125629663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7926899 + ... + 7927040.

It is an arithmetic number, because the mean of its divisors is an integer number (285370920).

Almost surely, 2^1125629669 is an apocalyptic number.

It is an amenable number.

1125629669 is a deficient number, since it is larger than the sum of its proper divisors (15854011).

1125629669 is an equidigital number, since it uses as much as digits as its factorization.

1125629669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15854010.

The product of its digits is 349920, while the sum is 47.

The square root of 1125629669 is about 33550.4049006864. The cubic root of 1125629669 is about 1040.2359144913.

The spelling of 1125629669 in words is "one billion, one hundred twenty-five million, six hundred twenty-nine thousand, six hundred sixty-nine".