40321025 has 12 divisors (see below), whose sum is σ = 52939692. Its totient is φ = 30359040.

The previous prime is 40321019. The next prime is 40321031. The reversal of 40321025 is 52012304.

It is an interprime number because it is at equal distance from previous prime (40321019) and next prime (40321031).

It can be written as a sum of positive squares in 6 ways, for example, as 5793649 + 34527376 = 2407^2 + 5876^2 .

It is not a de Polignac number, because 40321025 - 2⁸ = 40320769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40320994 and 40321012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47012 + ... + 47861.

It is an arithmetic number, because the mean of its divisors is an integer number (4411641).

It is a Proth number, since it is equal to 2461 ⋅ 2¹⁴ + 1 and 2461 < 2¹⁴.

Almost surely, 2^40321025 is an apocalyptic number.

It is an amenable number.

40321025 is a deficient number, since it is larger than the sum of its proper divisors (12618667).

40321025 is a wasteful number, since it uses less digits than its factorization.

40321025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94900 (or 94895 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40321025 is about 6349.8838572056. The cubic root of 40321025 is about 342.9076610002.

Adding to 40321025 its reverse (52012304), we get a palindrome (92333329).

The spelling of 40321025 in words is "forty million, three hundred twenty-one thousand, twenty-five".