1021131 has 12 divisors (see below), whose sum is σ = 1539408. Its totient is φ = 651024.

The previous prime is 1021129. The next prime is 1021157. The reversal of 1021131 is 1311201.

It is not a de Polignac number, because 1021131 - 2¹ = 1021129 is a prime.

It is a super-2 number, since 2×1021131² = 2085417038322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1021331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2260 + ... + 2673.

It is an arithmetic number, because the mean of its divisors is an integer number (128284).

2^1021131 is an apocalyptic number.

1021131 is a deficient number, since it is larger than the sum of its proper divisors (518277).

1021131 is a wasteful number, since it uses less digits than its factorization.

1021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1021131 is about 1010.5102671423. The cubic root of 1021131 is about 100.6994627779.

Adding to 1021131 its reverse (1311201), we get a palindrome (2332332).

The spelling of 1021131 in words is "one million, twenty-one thousand, one hundred thirty-one".