9961451 has 2 divisors, whose sum is σ = 9961452. Its totient is φ = 9961450.

The previous prime is 9961429. The next prime is 9961459. The reversal of 9961451 is 1541699.

It is a strong prime.

It is an emirp because it is prime and its reverse (1541699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9961451 - 2⁶ = 9961387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9961459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980725 + 4980726.

It is an arithmetic number, because the mean of its divisors is an integer number (4980726).

Almost surely, 2^9961451 is an apocalyptic number.

9961451 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961451 is an equidigital number, since it uses as much as digits as its factorization.

9961451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 9961451 is about 3156.1766427119. The cubic root of 9961451 is about 215.1662748360.

Subtracting from 9961451 its sum of digits (35), we obtain a triangular number (9961416 = T₄₄₆₃).

The spelling of 9961451 in words is "nine million, nine hundred sixty-one thousand, four hundred fifty-one".