44242421 has 4 divisors (see below), whose sum is σ = 44539500. Its totient is φ = 43945344.

The previous prime is 44242411. The next prime is 44242423. The reversal of 44242421 is 12424244.

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 23902321 + 20340100 = 4889^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 44242421 - 2²² = 40048117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44242423) 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, 148316 + ... + 148613.

It is an arithmetic number, because the mean of its divisors is an integer number (11134875).

Almost surely, 2^44242421 is an apocalyptic number.

It is an amenable number.

44242421 is a deficient number, since it is larger than the sum of its proper divisors (297079).

44242421 is a wasteful number, since it uses less digits than its factorization.

44242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297078.

The product of its digits is 2048, while the sum is 23.

The square root of 44242421 is about 6651.4976509054. The cubic root of 44242421 is about 353.6820029378.

Adding to 44242421 its reverse (12424244), we get a palindrome (56666665).

The spelling of 44242421 in words is "forty-four million, two hundred forty-two thousand, four hundred twenty-one".