1012399 has 2 divisors, whose sum is σ = 1012400. Its totient is φ = 1012398.

The previous prime is 1012397. The next prime is 1012411. The reversal of 1012399 is 9932101.

It is a weak prime.

It is an emirp because it is prime and its reverse (9932101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012399 - 2¹ = 1012397 is a prime.

Together with 1012397, it forms a pair of twin primes.

1012399 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506199 + 506200.

It is an arithmetic number, because the mean of its divisors is an integer number (506200).

2^1012399 is an apocalyptic number.

1012399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012399 is an equidigital number, since it uses as much as digits as its factorization.

1012399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1012399 is about 1006.1804013198. The cubic root of 1012399 is about 100.4116035012.

It can be divided in two parts, 101 and 2399, that added together give a square (2500 = 50²).

The spelling of 1012399 in words is "one million, twelve thousand, three hundred ninety-nine".