1020540140 has 24 divisors (see below), whose sum is σ = 2188734912. Its totient is φ = 399530240.

The previous prime is 1020540139. The next prime is 1020540151. The reversal of 1020540140 is 410450201.

It is a super-3 number, since 3×1020540140³ (a number of 28 digits) contains 333 as substring.

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, 541901 + ... + 543780.

It is an arithmetic number, because the mean of its divisors is an integer number (91197288).

Almost surely, 2^1020540140 is an apocalyptic number.

1020540140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020540140 is an abundant number, since it is smaller than the sum of its proper divisors (1168194772).

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

1020540140 is a wasteful number, since it uses less digits than its factorization.

1020540140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085737 (or 1085735 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1020540140 is about 31945.8939458579. The cubic root of 1020540140 is about 1006.8003635613.

Adding to 1020540140 its reverse (410450201), we get a palindrome (1430990341).

The spelling of 1020540140 in words is "one billion, twenty million, five hundred forty thousand, one hundred forty".