1231764135 has 16 divisors (see below), whose sum is σ = 2252368896. Its totient is φ = 563092128.

The previous prime is 1231764101. The next prime is 1231764139. The reversal of 1231764135 is 5314671321.

It is not a de Polignac number, because 1231764135 - 2⁷ = 1231764007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231764096 and 1231764105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231764139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5865439 + ... + 5865648.

It is an arithmetic number, because the mean of its divisors is an integer number (140773056).

Almost surely, 2^1231764135 is an apocalyptic number.

1231764135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231764135 is a deficient number, since it is larger than the sum of its proper divisors (1020604761).

1231764135 is a wasteful number, since it uses less digits than its factorization.

1231764135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11731102.

The product of its digits is 15120, while the sum is 33.

The square root of 1231764135 is about 35096.4974748193. The cubic root of 1231764135 is about 1071.9532653825.

The spelling of 1231764135 in words is "one billion, two hundred thirty-one million, seven hundred sixty-four thousand, one hundred thirty-five".