121240375 has 8 divisors (see below), whose sum is σ = 151308144. Its totient is φ = 96992200.

The previous prime is 121240351. The next prime is 121240391. The reversal of 121240375 is 573042121.

It is a happy number.

It is not a de Polignac number, because 121240375 - 2²⁵ = 87685943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484837 + ... + 485086.

It is an arithmetic number, because the mean of its divisors is an integer number (18913518).

Almost surely, 2^121240375 is an apocalyptic number.

121240375 is a deficient number, since it is larger than the sum of its proper divisors (30067769).

121240375 is an frugal number, since it uses more digits than its factorization.

121240375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969938 (or 969928 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 121240375 is about 11010.9207153625. The cubic root of 121240375 is about 494.9360526854.

Adding to 121240375 its reverse (573042121), we get a palindrome (694282496).

The spelling of 121240375 in words is "one hundred twenty-one million, two hundred forty thousand, three hundred seventy-five".