1025540620 has 24 divisors (see below), whose sum is σ = 2319300144. Its totient is φ = 378661056.

The previous prime is 1025540609. The next prime is 1025540639. The reversal of 1025540620 is 260455201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1971934 + ... + 1972453.

It is an arithmetic number, because the mean of its divisors is an integer number (96637506).

Almost surely, 2^1025540620 is an apocalyptic number.

1025540620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025540620 is an abundant number, since it is smaller than the sum of its proper divisors (1293759524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025540620 is a wasteful number, since it uses less digits than its factorization.

1025540620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944409 (or 3944407 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1025540620 is about 32024.0631400826. The cubic root of 1025540620 is about 1008.4420708877.

Adding to 1025540620 its reverse (260455201), we get a palindrome (1285995821).

The spelling of 1025540620 in words is "one billion, twenty-five million, five hundred forty thousand, six hundred twenty".