2529421 has 2 divisors, whose sum is σ = 2529422. Its totient is φ = 2529420.

The previous prime is 2529419. The next prime is 2529463. The reversal of 2529421 is 1249252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 1232100 = 1139^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2529421 - 2¹ = 2529419 is a prime.

Together with 2529419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2529491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1264710 + 1264711.

It is an arithmetic number, because the mean of its divisors is an integer number (1264711).

2^2529421 is an apocalyptic number.

It is an amenable number.

2529421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2529421 is an equidigital number, since it uses as much as digits as its factorization.

2529421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 2529421 is about 1590.4153545536. The cubic root of 2529421 is about 136.2512117279.

The spelling of 2529421 in words is "two million, five hundred twenty-nine thousand, four hundred twenty-one".