1291528855 has 16 divisors (see below), whose sum is σ = 1562198400. Its totient is φ = 1025009440.

The previous prime is 1291528853. The next prime is 1291528873. The reversal of 1291528855 is 5588251921.

It is not a de Polignac number, because 1291528855 - 2¹ = 1291528853 is a prime.

It is a super-2 number, since 2×1291528855² = 3336093566595222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291528853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437976 + ... + 440914.

It is an arithmetic number, because the mean of its divisors is an integer number (97637400).

Almost surely, 2^1291528855 is an apocalyptic number.

1291528855 is a deficient number, since it is larger than the sum of its proper divisors (270669545).

1291528855 is a wasteful number, since it uses less digits than its factorization.

1291528855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614.

The product of its digits is 288000, while the sum is 46.

The square root of 1291528855 is about 35937.8471113671. The cubic root of 1291528855 is about 1089.0171132937.

The spelling of 1291528855 in words is "one billion, two hundred ninety-one million, five hundred twenty-eight thousand, eight hundred fifty-five".