1020142515 has 48 divisors (see below), whose sum is σ = 1924825248. Its totient is φ = 459938304.

The previous prime is 1020142507. The next prime is 1020142517. The reversal of 1020142515 is 5152410201.

It is not a de Polignac number, because 1020142515 - 2³ = 1020142507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1020142491 and 1020142500.

It is not an unprimeable number, because it can be changed into a prime (1020142517) 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 47 ways as a sum of consecutive naturals, for example, 44149 + ... + 63161.

It is an arithmetic number, because the mean of its divisors is an integer number (40100526).

Almost surely, 2^1020142515 is an apocalyptic number.

1020142515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020142515 is a deficient number, since it is larger than the sum of its proper divisors (904682733).

1020142515 is a wasteful number, since it uses less digits than its factorization.

1020142515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19108 (or 19101 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1020142515 is about 31939.6699262845. The cubic root of 1020142515 is about 1006.6695893492.

Adding to 1020142515 its reverse (5152410201), we get a palindrome (6172552716).

The spelling of 1020142515 in words is "one billion, twenty million, one hundred forty-two thousand, five hundred fifteen".