40507123 has 4 divisors (see below), whose sum is σ = 40684240. Its totient is φ = 40330008.

The previous prime is 40507121. The next prime is 40507127. The reversal of 40507123 is 32170504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40507123 - 2¹ = 40507121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40507094 and 40507103.

It is not an unprimeable number, because it can be changed into a prime (40507121) 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, 88215 + ... + 88672.

It is an arithmetic number, because the mean of its divisors is an integer number (10171060).

Almost surely, 2^40507123 is an apocalyptic number.

40507123 is a deficient number, since it is larger than the sum of its proper divisors (177117).

40507123 is a wasteful number, since it uses less digits than its factorization.

40507123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177116.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 40507123 is about 6364.5206418080. The cubic root of 40507123 is about 343.4344044242.

Adding to 40507123 its reverse (32170504), we get a palindrome (72677627).

The spelling of 40507123 in words is "forty million, five hundred seven thousand, one hundred twenty-three".