1310523123 has 16 divisors (see below), whose sum is σ = 2150602496. Its totient is φ = 691264800.

The previous prime is 1310523121. The next prime is 1310523127. The reversal of 1310523123 is 3213250131.

It is not a de Polignac number, because 1310523123 - 2¹ = 1310523121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1310523123.

It is not an unprimeable number, because it can be changed into a prime (1310523121) 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, 2399953 + ... + 2400498.

It is an arithmetic number, because the mean of its divisors is an integer number (134412656).

Almost surely, 2^1310523123 is an apocalyptic number.

1310523123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1310523123 is a deficient number, since it is larger than the sum of its proper divisors (840079373).

1310523123 is a wasteful number, since it uses less digits than its factorization.

1310523123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800474.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1310523123 is about 36201.1480895289. The cubic root of 1310523123 is about 1094.3298090320.

Adding to 1310523123 its reverse (3213250131), we get a palindrome (4523773254).

The spelling of 1310523123 in words is "one billion, three hundred ten million, five hundred twenty-three thousand, one hundred twenty-three".