1020140155 has 8 divisors (see below), whose sum is σ = 1224630000. Its totient is φ = 815804256.

The previous prime is 1020140113. The next prime is 1020140167. The reversal of 1020140155 is 5510410201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020140155 is a prime.

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, 23365 + ... + 50854.

It is an arithmetic number, because the mean of its divisors is an integer number (153078750).

Almost surely, 2^1020140155 is an apocalyptic number.

1020140155 is a deficient number, since it is larger than the sum of its proper divisors (204489845).

1020140155 is an equidigital number, since it uses as much as digits as its factorization.

1020140155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76973.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1020140155 is about 31939.6329816108. The cubic root of 1020140155 is about 1006.6688130714.

Adding to 1020140155 its reverse (5510410201), we get a palindrome (6530550356).

The spelling of 1020140155 in words is "one billion, twenty million, one hundred forty thousand, one hundred fifty-five".