1021531142 has 8 divisors (see below), whose sum is σ = 1549513800. Its totient is φ = 505026544.

The previous prime is 1021531129. The next prime is 1021531163. The reversal of 1021531142 is 2411351201.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2869292 + ... + 2869647.

It is an arithmetic number, because the mean of its divisors is an integer number (193689225).

Almost surely, 2^1021531142 is an apocalyptic number.

1021531142 is a deficient number, since it is larger than the sum of its proper divisors (527982658).

1021531142 is an equidigital number, since it uses as much as digits as its factorization.

1021531142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739030.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1021531142 is about 31961.4008141070. The cubic root of 1021531142 is about 1007.1261447676.

Adding to 1021531142 its reverse (2411351201), we get a palindrome (3432882343).

The spelling of 1021531142 in words is "one billion, twenty-one million, five hundred thirty-one thousand, one hundred forty-two".