121451425 has 6 divisors (see below), whose sum is σ = 150599798. Its totient is φ = 97161120.

The previous prime is 121451423. The next prime is 121451437. The reversal of 121451425 is 524154121.

It can be written as a sum of positive squares in 3 ways, for example, as 42614784 + 78836641 = 6528^2 + 8879^2 .

It is not a de Polignac number, because 121451425 - 2¹ = 121451423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 4858057 = 121451425 / (1 + 2 + 1 + 4 + 5 + 1 + 4 + 2 + 5).

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 121451425.

It is not an unprimeable number, because it can be changed into a prime (121451423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2429004 + ... + 2429053.

Almost surely, 2^121451425 is an apocalyptic number.

It is an amenable number.

121451425 is a deficient number, since it is larger than the sum of its proper divisors (29148373).

121451425 is an equidigital number, since it uses as much as digits as its factorization.

121451425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858067 (or 4858062 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 121451425 is about 11020.5002155075. The cubic root of 121451425 is about 495.2230739616.

It can be divided in two parts, 12145142 and 5, that multiplied together give a triangular number (60725710 = T₁₁₀₂₀).

The spelling of 121451425 in words is "one hundred twenty-one million, four hundred fifty-one thousand, four hundred twenty-five".