2120387 has 2 divisors, whose sum is σ = 2120388. Its totient is φ = 2120386.

The previous prime is 2120383. The next prime is 2120411. The reversal of 2120387 is 7830212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120387 - 2² = 2120383 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2120383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060193 + 1060194.

It is an arithmetic number, because the mean of its divisors is an integer number (1060194).

2^2120387 is an apocalyptic number.

2120387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120387 is an equidigital number, since it uses as much as digits as its factorization.

2120387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2120387 is about 1456.1548681373. The cubic root of 2120387 is about 128.4709821581.

Adding to 2120387 its reverse (7830212), we get a palindrome (9950599).

The spelling of 2120387 in words is "two million, one hundred twenty thousand, three hundred eighty-seven".