10202391 has 12 divisors (see below), whose sum is σ = 14774760. Its totient is φ = 6784080.

The previous prime is 10202389. The next prime is 10202393. The reversal of 10202391 is 19320201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10202389) and next prime (10202393).

It is not a de Polignac number, because 10202391 - 2¹ = 10202389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202393) 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, 2920 + ... + 5378.

It is an arithmetic number, because the mean of its divisors is an integer number (1231230).

Almost surely, 2^10202391 is an apocalyptic number.

10202391 is a deficient number, since it is larger than the sum of its proper divisors (4572369).

10202391 is a wasteful number, since it uses less digits than its factorization.

10202391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 10202391 is about 3194.1181881702. The cubic root of 10202391 is about 216.8872328501.

Adding to 10202391 its reverse (19320201), we get a palindrome (29522592).

The spelling of 10202391 in words is "ten million, two hundred two thousand, three hundred ninety-one".