2105420457 has 16 divisors (see below), whose sum is σ = 3377116160. Its totient is φ = 1139776272.

The previous prime is 2105420423. The next prime is 2105420477. The reversal of 2105420457 is 7540245012.

It is not a de Polignac number, because 2105420457 - 2⁶ = 2105420393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105420477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637973 + ... + 2638770.

It is an arithmetic number, because the mean of its divisors is an integer number (211069760).

Almost surely, 2^2105420457 is an apocalyptic number.

It is an amenable number.

2105420457 is a deficient number, since it is larger than the sum of its proper divisors (1271695703).

2105420457 is a wasteful number, since it uses less digits than its factorization.

2105420457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276772.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 2105420457 is about 45884.8608693543. The cubic root of 2105420457 is about 1281.6800158767.

Adding to 2105420457 its reverse (7540245012), we get a palindrome (9645665469).

The spelling of 2105420457 in words is "two billion, one hundred five million, four hundred twenty thousand, four hundred fifty-seven".