102137501 has 4 divisors (see below), whose sum is σ = 104898012. Its totient is φ = 99376992.

The previous prime is 102137491. The next prime is 102137509. The reversal of 102137501 is 105731201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73085401 + 29052100 = 8549^2 + 5390^2 .

It is a cyclic number.

It is not a de Polignac number, because 102137501 - 2¹⁸ = 101875357 is a prime.

It is a super-2 number, since 2×102137501² = 20864138221050002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102137509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380200 + ... + 1380273.

It is an arithmetic number, because the mean of its divisors is an integer number (26224503).

Almost surely, 2^102137501 is an apocalyptic number.

It is an amenable number.

102137501 is a deficient number, since it is larger than the sum of its proper divisors (2760511).

102137501 is an equidigital number, since it uses as much as digits as its factorization.

102137501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760510.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 102137501 is about 10106.3099596242. The cubic root of 102137501 is about 467.4427295034.

Adding to 102137501 its reverse (105731201), we get a palindrome (207868702).

The spelling of 102137501 in words is "one hundred two million, one hundred thirty-seven thousand, five hundred one".