1025821436 has 48 divisors (see below), whose sum is σ = 1946004480. Its totient is φ = 471915840.

The previous prime is 1025821427. The next prime is 1025821439. The reversal of 1025821436 is 6341285201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025821439) 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 in 15 ways as a sum of consecutive naturals, for example, 253106 + ... + 257126.

It is an arithmetic number, because the mean of its divisors is an integer number (40541760).

Almost surely, 2^1025821436 is an apocalyptic number.

It is an amenable number.

1025821436 is a deficient number, since it is larger than the sum of its proper divisors (920183044).

1025821436 is a wasteful number, since it uses less digits than its factorization.

1025821436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154 (or 4152 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1025821436 is about 32028.4472929925. The cubic root of 1025821436 is about 1008.5341071657.

The spelling of 1025821436 in words is "one billion, twenty-five million, eight hundred twenty-one thousand, four hundred thirty-six".