40206425 has 12 divisors (see below), whose sum is σ = 56978496. Its totient is φ = 27570000.

The previous prime is 40206421. The next prime is 40206431. The reversal of 40206425 is 52460204.

It is not a de Polignac number, because 40206425 - 2² = 40206421 is a prime.

It is a super-2 number, since 2×40206425² = 3233113222561250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40206425.

It is not an unprimeable number, because it can be changed into a prime (40206421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114701 + ... + 115050.

It is an arithmetic number, because the mean of its divisors is an integer number (4748208).

Almost surely, 2^40206425 is an apocalyptic number.

It is an amenable number.

40206425 is a deficient number, since it is larger than the sum of its proper divisors (16772071).

40206425 is a wasteful number, since it uses less digits than its factorization.

40206425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229768 (or 229763 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40206425 is about 6340.8536491548. The cubic root of 40206425 is about 342.5824831978.

Adding to 40206425 its reverse (52460204), we get a palindrome (92666629).

The spelling of 40206425 in words is "forty million, two hundred six thousand, four hundred twenty-five".