40145452 has 6 divisors (see below), whose sum is σ = 70254548. Its totient is φ = 20072724.

The previous prime is 40145447. The next prime is 40145477. The reversal of 40145452 is 25454104.

It is a happy number.

It is a super-2 number, since 2×40145452² = 3223314632568608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018178 + ... + 5018185.

Almost surely, 2^40145452 is an apocalyptic number.

It is an amenable number.

40145452 is a deficient number, since it is larger than the sum of its proper divisors (30109096).

40145452 is a wasteful number, since it uses less digits than its factorization.

40145452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10036367 (or 10036365 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 40145452 is about 6336.0438761107. The cubic root of 40145452 is about 342.4092202622.

Adding to 40145452 its reverse (25454104), we get a palindrome (65599556).

The spelling of 40145452 in words is "forty million, one hundred forty-five thousand, four hundred fifty-two".