121265137 has 4 divisors (see below), whose sum is σ = 138588736. Its totient is φ = 103941540.

The previous prime is 121265101. The next prime is 121265141. The reversal of 121265137 is 731562121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121265137 - 2⁷ = 121265009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121265147) 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 3 ways as a sum of consecutive naturals, for example, 8661789 + ... + 8661802.

It is an arithmetic number, because the mean of its divisors is an integer number (34647184).

Almost surely, 2^121265137 is an apocalyptic number.

It is an amenable number.

121265137 is a deficient number, since it is larger than the sum of its proper divisors (17323599).

121265137 is an equidigital number, since it uses as much as digits as its factorization.

121265137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17323598.

The product of its digits is 2520, while the sum is 28.

The square root of 121265137 is about 11012.0450870853. The cubic root of 121265137 is about 494.9697454556.

The spelling of 121265137 in words is "one hundred twenty-one million, two hundred sixty-five thousand, one hundred thirty-seven".