40725091 has 6 divisors (see below), whose sum is σ = 44764076. Its totient is φ = 37022700.

The previous prime is 40725089. The next prime is 40725101. The reversal of 40725091 is 19052704.

It is a happy number.

It is not a de Polignac number, because 40725091 - 2¹ = 40725089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40725011) 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, 168165 + ... + 168406.

Almost surely, 2^40725091 is an apocalyptic number.

40725091 is a deficient number, since it is larger than the sum of its proper divisors (4038985).

40725091 is a wasteful number, since it uses less digits than its factorization.

40725091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336593 (or 336582 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 40725091 is about 6381.6213457083. The cubic root of 40725091 is about 344.0493073138.

Adding to 40725091 its reverse (19052704), we get a palindrome (59777795).

The spelling of 40725091 in words is "forty million, seven hundred twenty-five thousand, ninety-one".