40521145 has 8 divisors (see below), whose sum is σ = 55571904. Its totient is φ = 27785904.

The previous prime is 40521133. The next prime is 40521157. The reversal of 40521145 is 54112504.

It is an interprime number because it is at equal distance from previous prime (40521133) and next prime (40521157).

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 40521145 - 2⁹ = 40520633 is a prime.

It is a super-2 number, since 2×40521145² = 3283926384222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578839 + ... + 578908.

It is an arithmetic number, because the mean of its divisors is an integer number (6946488).

Almost surely, 2^40521145 is an apocalyptic number.

It is an amenable number.

40521145 is a deficient number, since it is larger than the sum of its proper divisors (15050759).

40521145 is a wasteful number, since it uses less digits than its factorization.

40521145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157759.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 40521145 is about 6365.6221219925. The cubic root of 40521145 is about 343.4740277572.

Adding to 40521145 its reverse (54112504), we get a palindrome (94633649).

The spelling of 40521145 in words is "forty million, five hundred twenty-one thousand, one hundred forty-five".