120136537 has 4 divisors (see below), whose sum is σ = 121375156. Its totient is φ = 118897920.

The previous prime is 120136507. The next prime is 120136547. The reversal of 120136537 is 735631021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735631021 = 17 ⋅43272413.

It can be written as a sum of positive squares in 2 ways, for example, as 66977856 + 53158681 = 8184^2 + 7291^2 .

It is a cyclic number.

It is not a de Polignac number, because 120136537 - 2⁷ = 120136409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120136507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619164 + ... + 619357.

It is an arithmetic number, because the mean of its divisors is an integer number (30343789).

Almost surely, 2^120136537 is an apocalyptic number.

It is an amenable number.

120136537 is a deficient number, since it is larger than the sum of its proper divisors (1238619).

120136537 is an equidigital number, since it uses as much as digits as its factorization.

120136537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238618.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 120136537 is about 10960.6814112992. The cubic root of 120136537 is about 493.4294157370.

Adding to 120136537 its reverse (735631021), we get a palindrome (855767558).

The spelling of 120136537 in words is "one hundred twenty million, one hundred thirty-six thousand, five hundred thirty-seven".