525273421 has 2 divisors, whose sum is σ = 525273422. Its totient is φ = 525273420.

The previous prime is 525273391. The next prime is 525273439. The reversal of 525273421 is 124372525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348755625 + 176517796 = 18675^2 + 13286^2 .

It is a cyclic number.

It is not a de Polignac number, because 525273421 - 2⁵ = 525273389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525271421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262636710 + 262636711.

It is an arithmetic number, because the mean of its divisors is an integer number (262636711).

Almost surely, 2^525273421 is an apocalyptic number.

It is an amenable number.

525273421 is a deficient number, since it is larger than the sum of its proper divisors (1).

525273421 is an equidigital number, since it uses as much as digits as its factorization.

525273421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 525273421 is about 22918.8442335123. The cubic root of 525273421 is about 806.8543448259.

The spelling of 525273421 in words is "five hundred twenty-five million, two hundred seventy-three thousand, four hundred twenty-one".