1269621125 has 12 divisors (see below), whose sum is σ = 1584984492. Its totient is φ = 1015378200.

The previous prime is 1269621109. The next prime is 1269621161. The reversal of 1269621125 is 5211269621.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 40627876 + 1228993249 = 6374^2 + 35057^2 .

It is not a de Polignac number, because 1269621125 - 2⁴ = 1269621109 is a prime.

It is a super-2 number, since 2×1269621125² = 3223875602092531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396782 + ... + 399968.

It is an arithmetic number, because the mean of its divisors is an integer number (132082041).

Almost surely, 2^1269621125 is an apocalyptic number.

It is an amenable number.

1269621125 is a deficient number, since it is larger than the sum of its proper divisors (315363367).

1269621125 is an frugal number, since it uses more digits than its factorization.

1269621125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6389 (or 3192 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 1269621125 is about 35631.7432214591. The cubic root of 1269621125 is about 1082.8244329057.

The spelling of 1269621125 in words is "one billion, two hundred sixty-nine million, six hundred twenty-one thousand, one hundred twenty-five".