30121453 has 2 divisors, whose sum is σ = 30121454. Its totient is φ = 30121452.

The previous prime is 30121411. The next prime is 30121493. The reversal of 30121453 is 35412103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29452329 + 669124 = 5427^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121453 - 2¹⁷ = 29990381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30121453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060726 + 15060727.

It is an arithmetic number, because the mean of its divisors is an integer number (15060727).

Almost surely, 2^30121453 is an apocalyptic number.

It is an amenable number.

30121453 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121453 is an equidigital number, since it uses as much as digits as its factorization.

30121453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30121453 is about 5488.3014676674. The cubic root of 30121453 is about 311.1420001313.

Adding to 30121453 its reverse (35412103), we get a palindrome (65533556).

It can be divided in two parts, 3012 and 1453, that added together give a triangular number (4465 = T₉₄).

The spelling of 30121453 in words is "thirty million, one hundred twenty-one thousand, four hundred fifty-three".