102126731 has 6 divisors (see below), whose sum is σ = 118800540. Its totient is φ = 87537156.

The previous prime is 102126709. The next prime is 102126751. The reversal of 102126731 is 137621201.

It is not a de Polignac number, because 102126731 - 2¹⁰ = 102125707 is a prime.

It is a super-3 number, since 3×102126731³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102126697 and 102126706.

It is not an unprimeable number, because it can be changed into a prime (102126751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1042061 + ... + 1042158.

It is an arithmetic number, because the mean of its divisors is an integer number (19800090).

Almost surely, 2^102126731 is an apocalyptic number.

102126731 is a deficient number, since it is larger than the sum of its proper divisors (16673809).

102126731 is an equidigital number, since it uses as much as digits as its factorization.

102126731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084233 (or 2084226 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 102126731 is about 10105.7771101484. Note that the first 3 decimals coincide. The cubic root of 102126731 is about 467.4262989234.

Adding to 102126731 its reverse (137621201), we get a palindrome (239747932).

The spelling of 102126731 in words is "one hundred two million, one hundred twenty-six thousand, seven hundred thirty-one".