121422625 has 8 divisors (see below), whose sum is σ = 151535592. Its totient is φ = 97138000.

The previous prime is 121422617. The next prime is 121422643. The reversal of 121422625 is 526224121.

It can be written as a sum of positive squares in 4 ways, for example, as 2547216 + 118875409 = 1596^2 + 10903^2 .

It is not a de Polignac number, because 121422625 - 2³ = 121422617 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 self number, because there is not a number n which added to its sum of digits gives 121422625.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 485566 + ... + 485815.

It is an arithmetic number, because the mean of its divisors is an integer number (18941949).

Almost surely, 2^121422625 is an apocalyptic number.

It is an amenable number.

121422625 is a deficient number, since it is larger than the sum of its proper divisors (30112967).

121422625 is an frugal number, since it uses more digits than its factorization.

121422625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971396 (or 971386 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 121422625 is about 11019.1934822835. The cubic root of 121422625 is about 495.1839264807.

Adding to 121422625 its reverse (526224121), we get a palindrome (647646746).

The spelling of 121422625 in words is "one hundred twenty-one million, four hundred twenty-two thousand, six hundred twenty-five".