40121003 has 24 divisors (see below), whose sum is σ = 46934160. Its totient is φ = 34076160.

The previous prime is 40120991. The next prime is 40121009. The reversal of 40121003 is 30012104.

It is a happy number.

40121003 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 40121003 - 2¹⁸ = 39858859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40121009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221573 + ... + 221753.

It is an arithmetic number, because the mean of its divisors is an integer number (1955590).

Almost surely, 2^40121003 is an apocalyptic number.

40121003 is a deficient number, since it is larger than the sum of its proper divisors (6813157).

40121003 is a wasteful number, since it uses less digits than its factorization.

40121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40121003 is about 6334.1142237885. The cubic root of 40121003 is about 342.3396958816.

Adding to 40121003 its reverse (30012104), we get a palindrome (70133107).

It can be divided in two parts, 4012 and 1003, that multiplied together give a square (4024036 = 2006²).

The spelling of 40121003 in words is "forty million, one hundred twenty-one thousand, three".