40445121 has 8 divisors (see below), whose sum is σ = 53987904. Its totient is φ = 26932880.

The previous prime is 40445117. The next prime is 40445123. The reversal of 40445121 is 12154404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40445121 - 2² = 40445117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40445123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341 + ... + 9986.

It is an arithmetic number, because the mean of its divisors is an integer number (6748488).

Almost surely, 2^40445121 is an apocalyptic number.

It is an amenable number.

40445121 is a deficient number, since it is larger than the sum of its proper divisors (13542783).

40445121 is a wasteful number, since it uses less digits than its factorization.

40445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15271.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40445121 is about 6359.6478676103. The cubic root of 40445121 is about 343.2590896324.

Adding to 40445121 its reverse (12154404), we get a palindrome (52599525).

The spelling of 40445121 in words is "forty million, four hundred forty-five thousand, one hundred twenty-one".