40072001 has 4 divisors (see below), whose sum is σ = 41003952. Its totient is φ = 39140052.

The previous prime is 40071979. The next prime is 40072031. The reversal of 40072001 is 10027004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40072001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40072031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465911 + ... + 465996.

It is an arithmetic number, because the mean of its divisors is an integer number (10250988).

Almost surely, 2^40072001 is an apocalyptic number.

It is an amenable number.

40072001 is a deficient number, since it is larger than the sum of its proper divisors (931951).

40072001 is an equidigital number, since it uses as much as digits as its factorization.

40072001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931950.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 40072001 is about 6330.2449399688. The cubic root of 40072001 is about 342.2002663002.

Adding to 40072001 its reverse (10027004), we get a palindrome (50099005).

The spelling of 40072001 in words is "forty million, seventy-two thousand, one".