2520435421 has 16 divisors (see below), whose sum is σ = 2894492160. Its totient is φ = 2149907760.

The previous prime is 2520435409. The next prime is 2520435433. The reversal of 2520435421 is 1245340252.

It is an interprime number because it is at equal distance from previous prime (2520435409) and next prime (2520435433).

It is not a de Polignac number, because 2520435421 - 2⁵ = 2520435389 is a prime.

It is a super-2 number, since 2×2520435421² = 12705189422862894482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2520435421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520435221) 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, 1603566 + ... + 1605136.

It is an arithmetic number, because the mean of its divisors is an integer number (180905760).

Almost surely, 2^2520435421 is an apocalyptic number.

It is an amenable number.

2520435421 is a deficient number, since it is larger than the sum of its proper divisors (374056739).

2520435421 is a wasteful number, since it uses less digits than its factorization.

2520435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 2520435421 is about 50203.9383016910. The cubic root of 2520435421 is about 1360.8967955181.

Adding to 2520435421 its reverse (1245340252), we get a palindrome (3765775673).

The spelling of 2520435421 in words is "two billion, five hundred twenty million, four hundred thirty-five thousand, four hundred twenty-one".