40603021 has 8 divisors (see below), whose sum is σ = 43054200. Its totient is φ = 38158848.

The previous prime is 40603001. The next prime is 40603037. The reversal of 40603021 is 12030604.

It can be written as a sum of positive squares in 4 ways, for example, as 9922500 + 30680521 = 3150^2 + 5539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40603021 - 2⁷ = 40602893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40602986 and 40603004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40603001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14655 + ... + 17203.

It is an arithmetic number, because the mean of its divisors is an integer number (5381775).

Almost surely, 2^40603021 is an apocalyptic number.

It is an amenable number.

40603021 is a deficient number, since it is larger than the sum of its proper divisors (2451179).

40603021 is a wasteful number, since it uses less digits than its factorization.

40603021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40603021 is about 6372.0499841103. The cubic root of 40603021 is about 343.7052104288.

Adding to 40603021 its reverse (12030604), we get a palindrome (52633625).

The spelling of 40603021 in words is "forty million, six hundred three thousand, twenty-one".