1012531261 has 8 divisors (see below), whose sum is σ = 1218082880. Its totient is φ = 822205728.

The previous prime is 1012531171. The next prime is 1012531279. The reversal of 1012531261 is 1621352101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1012531261 - 2¹⁷ = 1012400189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012531361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3806376 + ... + 3806641.

It is an arithmetic number, because the mean of its divisors is an integer number (152260360).

Almost surely, 2^1012531261 is an apocalyptic number.

It is an amenable number.

1012531261 is a deficient number, since it is larger than the sum of its proper divisors (205551619).

1012531261 is an equidigital number, since it uses as much as digits as its factorization.

1012531261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613043.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1012531261 is about 31820.2963688272. The cubic root of 1012531261 is about 1004.1597594087.

Adding to 1012531261 its reverse (1621352101), we get a palindrome (2633883362).

The spelling of 1012531261 in words is "one billion, twelve million, five hundred thirty-one thousand, two hundred sixty-one".