15450961 has 4 divisors (see below), whose sum is σ = 15662692. Its totient is φ = 15239232.

The previous prime is 15450923. The next prime is 15450983. The reversal of 15450961 is 16905451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12006225 + 3444736 = 3465^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 15450961 - 2¹⁹ = 14926673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15450901) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 105756 + ... + 105901.

It is an arithmetic number, because the mean of its divisors is an integer number (3915673).

Almost surely, 2^15450961 is an apocalyptic number.

It is an amenable number.

15450961 is a deficient number, since it is larger than the sum of its proper divisors (211731).

15450961 is an equidigital number, since it uses as much as digits as its factorization.

15450961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211730.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 15450961 is about 3930.7710439556. The cubic root of 15450961 is about 249.0683242342.

It can be divided in two parts, 154 and 50961, that added together give a palindrome (51115).

The spelling of 15450961 in words is "fifteen million, four hundred fifty thousand, nine hundred sixty-one".