1025744021 has 2 divisors, whose sum is σ = 1025744022. Its totient is φ = 1025744020.

The previous prime is 1025744003. The next prime is 1025744039. The reversal of 1025744021 is 1204475201.

It is a balanced prime because it is at equal distance from previous prime (1025744003) and next prime (1025744039).

It can be written as a sum of positive squares in only one way, i.e., 854919121 + 170824900 = 29239^2 + 13070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025744021 - 2¹⁰ = 1025742997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021744021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512872010 + 512872011.

It is an arithmetic number, because the mean of its divisors is an integer number (512872011).

Almost surely, 2^1025744021 is an apocalyptic number.

It is an amenable number.

1025744021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025744021 is an equidigital number, since it uses as much as digits as its factorization.

1025744021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1025744021 is about 32027.2387351767. The cubic root of 1025744021 is about 1008.5087363981.

The spelling of 1025744021 in words is "one billion, twenty-five million, seven hundred forty-four thousand, twenty-one".