40251001 has 6 divisors (see below), whose sum is σ = 46822650. Its totient is φ = 34500816.

The previous prime is 40250981. The next prime is 40251007. The reversal of 40251001 is 10015204.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 561001 = 6300^2 + 749^2 .

It is not a de Polignac number, because 40251001 - 2¹¹ = 40248953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40251007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410676 + ... + 410773.

It is an arithmetic number, because the mean of its divisors is an integer number (7803775).

Almost surely, 2^40251001 is an apocalyptic number.

It is an amenable number.

40251001 is a deficient number, since it is larger than the sum of its proper divisors (6571649).

40251001 is an equidigital number, since it uses as much as digits as its factorization.

40251001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821463 (or 821456 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 40251001 is about 6344.3676595859. The cubic root of 40251001 is about 342.7090410528.

Adding to 40251001 its reverse (10015204), we get a palindrome (50266205).

The spelling of 40251001 in words is "forty million, two hundred fifty-one thousand, one".