1925602421 has 2 divisors, whose sum is σ = 1925602422. Its totient is φ = 1925602420.

The previous prime is 1925602397. The next prime is 1925602423. The reversal of 1925602421 is 1242065291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1790136100 + 135466321 = 42310^2 + 11639^2 .

It is an emirp because it is prime and its reverse (1242065291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1925602421 is a prime.

It is a super-2 number, since 2×1925602421² = 7415889367522122482, which contains 22 as substring.

Together with 1925602423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1925602423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962801210 + 962801211.

It is an arithmetic number, because the mean of its divisors is an integer number (962801211).

Almost surely, 2^1925602421 is an apocalyptic number.

It is an amenable number.

1925602421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925602421 is an equidigital number, since it uses as much as digits as its factorization.

1925602421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1925602421 is about 43881.6866243767. The cubic root of 1925602421 is about 1244.1007190657.

The spelling of 1925602421 in words is "one billion, nine hundred twenty-five million, six hundred two thousand, four hundred twenty-one".