1020652542 has 128 divisors (see below), whose sum is σ = 2806809600. Its totient is φ = 267712128.

The previous prime is 1020652541. The next prime is 1020652543. The reversal of 1020652542 is 2452560201.

1020652542 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 652 + 5 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1020652541) and next prime (1020652543).

It is a super-2 number, since 2×1020652542² = 2083463222982123528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020652541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1124853 + ... + 1125759.

It is an arithmetic number, because the mean of its divisors is an integer number (21928200).

Almost surely, 2^1020652542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020652542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403404800).

1020652542 is an abundant number, since it is smaller than the sum of its proper divisors (1786157058).

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

1020652542 is a wasteful number, since it uses less digits than its factorization.

1020652542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1020652542 is about 31947.6531532443. The cubic root of 1020652542 is about 1006.8373251060.

The spelling of 1020652542 in words is "one billion, twenty million, six hundred fifty-two thousand, five hundred forty-two".