2141705421 has 16 divisors (see below), whose sum is σ = 3310849920. Its totient is φ = 1365724800.

The previous prime is 2141705417. The next prime is 2141705443. The reversal of 2141705421 is 1245071412.

It is not a de Polignac number, because 2141705421 - 2² = 2141705417 is a prime.

It is a super-2 number, since 2×2141705421² = 9173804220681574482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141705491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1723780 + ... + 1725021.

It is an arithmetic number, because the mean of its divisors is an integer number (206928120).

Almost surely, 2^2141705421 is an apocalyptic number.

It is an amenable number.

2141705421 is a deficient number, since it is larger than the sum of its proper divisors (1169144499).

2141705421 is a wasteful number, since it uses less digits than its factorization.

2141705421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448833 (or 3448827 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2141705421 is about 46278.5632987888. The cubic root of 2141705421 is about 1289.0009734046. Note that the first 3 decimals are identical.

Adding to 2141705421 its reverse (1245071412), we get a palindrome (3386776833).

The spelling of 2141705421 in words is "two billion, one hundred forty-one million, seven hundred five thousand, four hundred twenty-one".