40145451 has 4 divisors (see below), whose sum is σ = 53527272. Its totient is φ = 26763632.

The previous prime is 40145447. The next prime is 40145477. The reversal of 40145451 is 15454104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40145451 - 2² = 40145447 is a prime.

It is a super-2 number, since 2×40145451² = 3223314471986802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40145411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690906 + ... + 6690911.

It is an arithmetic number, because the mean of its divisors is an integer number (13381818).

Almost surely, 2^40145451 is an apocalyptic number.

40145451 is a deficient number, since it is larger than the sum of its proper divisors (13381821).

40145451 is a wasteful number, since it uses less digits than its factorization.

40145451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13381820.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 40145451 is about 6336.0437971971. The cubic root of 40145451 is about 342.4092174192.

Adding to 40145451 its reverse (15454104), we get a palindrome (55599555).

The spelling of 40145451 in words is "forty million, one hundred forty-five thousand, four hundred fifty-one".