1020642615 has 24 divisors (see below), whose sum is σ = 1782628848. Its totient is φ = 540184320.

The previous prime is 1020642611. The next prime is 1020642629. The reversal of 1020642615 is 5162460201.

1020642615 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 6 + 42 + 615 = 666.

It is not a de Polignac number, because 1020642615 - 2² = 1020642611 is a prime.

It is a super-2 number, since 2×1020642615² = 2083422695108076450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020642611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80674 + ... + 92463.

It is an arithmetic number, because the mean of its divisors is an integer number (74276202).

Almost surely, 2^1020642615 is an apocalyptic number.

1020642615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020642615 is a deficient number, since it is larger than the sum of its proper divisors (761986233).

1020642615 is a wasteful number, since it uses less digits than its factorization.

1020642615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173279 (or 173276 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1020642615 is about 31947.4977893418. The cubic root of 1020642615 is about 1006.8340608849.

The spelling of 1020642615 in words is "one billion, twenty million, six hundred forty-two thousand, six hundred fifteen".