1191902125 has 8 divisors (see below), whose sum is σ = 1487494008. Its totient is φ = 953521600.

The previous prime is 1191902083. The next prime is 1191902143. The reversal of 1191902125 is 5212091911.

It can be written as a sum of positive squares in 4 ways, for example, as 10055241 + 1181846884 = 3171^2 + 34378^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1191902125 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4767484 + ... + 4767733.

It is an arithmetic number, because the mean of its divisors is an integer number (185936751).

Almost surely, 2^1191902125 is an apocalyptic number.

It is an amenable number.

1191902125 is a deficient number, since it is larger than the sum of its proper divisors (295591883).

1191902125 is an frugal number, since it uses more digits than its factorization.

1191902125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535232 (or 9535222 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 1191902125 is about 34523.9355375369. The cubic root of 1191902125 is about 1060.2628175298.

The spelling of 1191902125 in words is "one billion, one hundred ninety-one million, nine hundred two thousand, one hundred twenty-five".