40121403 has 16 divisors (see below), whose sum is σ = 61232640. Its totient is φ = 22890816.

The previous prime is 40121399. The next prime is 40121423. The reversal of 40121403 is 30412104.

It is not a de Polignac number, because 40121403 - 2² = 40121399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40121423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18658 + ... + 20696.

It is an arithmetic number, because the mean of its divisors is an integer number (3827040).

Almost surely, 2^40121403 is an apocalyptic number.

40121403 is a deficient number, since it is larger than the sum of its proper divisors (21111237).

40121403 is a wasteful number, since it uses less digits than its factorization.

40121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40121403 is about 6334.1457987640. The cubic root of 40121403 is about 342.3408335685.

Adding to 40121403 its reverse (30412104), we get a palindrome (70533507).

The spelling of 40121403 in words is "forty million, one hundred twenty-one thousand, four hundred three".