1021502142 has 48 divisors (see below), whose sum is σ = 2346444672. Its totient is φ = 320604480.

The previous prime is 1021502123. The next prime is 1021502147. The reversal of 1021502142 is 2412051201.

1021502142 is a `hidden beast` number, since 1 + 0 + 21 + 502 + 142 = 666.

It is a super-2 number, since 2×1021502142² = 2086933252221176328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021502147) 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, 4093 + ... + 45384.

It is an arithmetic number, because the mean of its divisors is an integer number (48884264).

Almost surely, 2^1021502142 is an apocalyptic number.

1021502142 is an abundant number, since it is smaller than the sum of its proper divisors (1324942530).

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

1021502142 is a wasteful number, since it uses less digits than its factorization.

1021502142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49553 (or 49550 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1021502142 is about 31960.9471386566. The cubic root of 1021502142 is about 1007.1166143241.

Adding to 1021502142 its reverse (2412051201), we get a palindrome (3433553343).

The spelling of 1021502142 in words is "one billion, twenty-one million, five hundred two thousand, one hundred forty-two".