1125201439 has 4 divisors (see below), whose sum is σ = 1126293840. Its totient is φ = 1124109040.

The previous prime is 1125201433. The next prime is 1125201461. The reversal of 1125201439 is 9341025211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1125201439 - 2⁹ = 1125200927 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 (1125201433) 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, 544654 + ... + 546715.

It is an arithmetic number, because the mean of its divisors is an integer number (281573460).

Almost surely, 2^1125201439 is an apocalyptic number.

1125201439 is a deficient number, since it is larger than the sum of its proper divisors (1092401).

1125201439 is a wasteful number, since it uses less digits than its factorization.

1125201439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092400.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1125201439 is about 33544.0224034030. The cubic root of 1125201439 is about 1040.1039833776.

It can be divided in two parts, 11 and 25201439, that added together give a triangular number (25201450 = T₇₀₉₉).

The spelling of 1125201439 in words is "one billion, one hundred twenty-five million, two hundred one thousand, four hundred thirty-nine".