44512921 has 4 divisors (see below), whose sum is σ = 45598644. Its totient is φ = 43427200.

The previous prime is 44512907. The next prime is 44512957. The reversal of 44512921 is 12921544.

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 16040025 + 28472896 = 4005^2 + 5336^2 .

It is not a de Polignac number, because 44512921 - 2²³ = 36124313 is a prime.

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 44512921.

It is not an unprimeable number, because it can be changed into a prime (44516921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542800 + ... + 542881.

It is an arithmetic number, because the mean of its divisors is an integer number (11399661).

Almost surely, 2^44512921 is an apocalyptic number.

44512921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44512921 is a deficient number, since it is larger than the sum of its proper divisors (1085723).

44512921 is a wasteful number, since it uses less digits than its factorization.

44512921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085722.

The product of its digits is 2880, while the sum is 28.

The square root of 44512921 is about 6671.8004316676. The cubic root of 44512921 is about 354.4013477087.

It can be divided in two parts, 445 and 12921, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 44512921 in words is "forty-four million, five hundred twelve thousand, nine hundred twenty-one".