1025432540 has 24 divisors (see below), whose sum is σ = 2349173232. Its totient is φ = 372884480.

The previous prime is 1025432531. The next prime is 1025432563. The reversal of 1025432540 is 452345201.

It is a happy number.

It is a congruent number.

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, 2330309 + ... + 2330748.

It is an arithmetic number, because the mean of its divisors is an integer number (97882218).

Almost surely, 2^1025432540 is an apocalyptic number.

1025432540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025432540 is an abundant number, since it is smaller than the sum of its proper divisors (1323740692).

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

1025432540 is a wasteful number, since it uses less digits than its factorization.

1025432540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661077 (or 4661075 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1025432540 is about 32022.3756145605. The cubic root of 1025432540 is about 1008.4066436389.

Adding to 1025432540 its reverse (452345201), we get a palindrome (1477777741).

The spelling of 1025432540 in words is "one billion, twenty-five million, four hundred thirty-two thousand, five hundred forty".