1152409157 has 6 divisors (see below), whose sum is σ = 1174404582.
Its totient is φ = 1130423112.
The previous prime is 1152409129. The next prime is 1152409169. The reversal of 1152409157 is 7519042511.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 1065434881 + 86974276 = 32641^2 + 9326^2
It is not a de Polignac number, because 1152409157 - 230 = 78667333 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 (1152409177) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244808 + ... + 249470.
It is an arithmetic number, because the mean of its divisors is an integer number (195734097).
Almost surely, 21152409157 is an apocalyptic number.
It is an amenable number.
1152409157 is a deficient number, since it is larger than the sum of its proper divisors (21995425).
1152409157 is an frugal number, since it uses more digits than its factorization.
1152409157 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9379 (or 4716 counting only the distinct ones).
The product of its (nonzero) digits is 12600, while the sum is 35.
The square root of 1152409157 is about 33947.1524137151.
The cubic root of 1152409157 is about 1048.4206511746.
The spelling of 1152409157 in words is "one billion, one hundred fifty-two million, four hundred nine thousand, one hundred fifty-seven".