40250642 has 4 divisors (see below), whose sum is σ = 60375966. Its totient is φ = 20125320.

The previous prime is 40250641. The next prime is 40250657. The reversal of 40250642 is 24605204.

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

It can be written as a sum of positive squares in only one way, i.e., 24098281 + 16152361 = 4909^2 + 4019^2 .

It is a super-2 number, since 2×40250642² = 3240228362824328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40250641) 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 as a sum of consecutive naturals, namely, 10062659 + ... + 10062662.

Almost surely, 2^40250642 is an apocalyptic number.

40250642 is a deficient number, since it is larger than the sum of its proper divisors (20125324).

40250642 is a wasteful number, since it uses less digits than its factorization.

40250642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20125323.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40250642 is about 6344.3393667111. The cubic root of 40250642 is about 342.7080221721.

Adding to 40250642 its reverse (24605204), we get a palindrome (64855846).

The spelling of 40250642 in words is "forty million, two hundred fifty thousand, six hundred forty-two".