1025442649 has 48 divisors (see below), whose sum is σ = 1368372096. Its totient is φ = 758419200.

The previous prime is 1025442623. The next prime is 1025442653. The reversal of 1025442649 is 9462445201.

It is not a de Polignac number, because 1025442649 - 2¹⁵ = 1025409881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025442689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2243629 + ... + 2244085.

It is an arithmetic number, because the mean of its divisors is an integer number (28507752).

Almost surely, 2^1025442649 is an apocalyptic number.

It is an amenable number.

1025442649 is a deficient number, since it is larger than the sum of its proper divisors (342929447).

1025442649 is a wasteful number, since it uses less digits than its factorization.

1025442649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1025442649 is about 32022.5334569269. The cubic root of 1025442649 is about 1008.4099573460.

The spelling of 1025442649 in words is "one billion, twenty-five million, four hundred forty-two thousand, six hundred forty-nine".