30121265 has 8 divisors (see below), whose sum is σ = 37027368. Its totient is φ = 23509120.

The previous prime is 30121261. The next prime is 30121271. The reversal of 30121265 is 56212103.

It can be written as a sum of positive squares in 4 ways, for example, as 134689 + 29986576 = 367^2 + 5476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30121265 - 2² = 30121261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30121261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73262 + ... + 73671.

It is an arithmetic number, because the mean of its divisors is an integer number (4628421).

Almost surely, 2^30121265 is an apocalyptic number.

It is an amenable number.

30121265 is a deficient number, since it is larger than the sum of its proper divisors (6906103).

30121265 is a wasteful number, since it uses less digits than its factorization.

30121265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146979.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 30121265 is about 5488.2843403016. The cubic root of 30121265 is about 311.1413528095.

Adding to 30121265 its reverse (56212103), we get a palindrome (86333368).

It can be divided in two parts, 3012 and 1265, that multiplied together give a triangular number (3810180 = T₂₇₆₀).

The spelling of 30121265 in words is "thirty million, one hundred twenty-one thousand, two hundred sixty-five".