121550625 has 125 divisors (see below), whose sum is σ = 264697301. Its totient is φ = 55566000.

The previous prime is 121550617. The next prime is 121550633. The reversal of 121550625 is 526055121.

The square root of 121550625 is 11025.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (121550617) and next prime (121550633).

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 112021056 = 3087^2 + 10584^2 .

It is a tau number, because it is divible by the number of its divisors (125).

It is not a de Polignac number, because 121550625 - 2³ = 121550617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 124 ways as a sum of consecutive naturals, for example, 17364372 + ... + 17364378.

Almost surely, 2^121550625 is an apocalyptic number.

121550625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121550625 is the 11025-th square number.

121550625 is the 5513-rd centered octagonal number.

It is an amenable number.

121550625 is an abundant number, since it is smaller than the sum of its proper divisors (143146676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121550625 is an frugal number, since it uses more digits than its factorization.

121550625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 15 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The cubic root of 121550625 is about 495.3578679332.

The spelling of 121550625 in words is "one hundred twenty-one million, five hundred fifty thousand, six hundred twenty-five".