1031402661 has 16 divisors (see below), whose sum is σ = 1423474560. Its totient is φ = 663494720.

The previous prime is 1031402653. The next prime is 1031402681. The reversal of 1031402661 is 1662041301.

It is a cyclic number.

It is not a de Polignac number, because 1031402661 - 2³ = 1031402653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031402611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233671 + ... + 238043.

It is an arithmetic number, because the mean of its divisors is an integer number (88967160).

Almost surely, 2^1031402661 is an apocalyptic number.

It is an amenable number.

1031402661 is a deficient number, since it is larger than the sum of its proper divisors (392071899).

1031402661 is a wasteful number, since it uses less digits than its factorization.

1031402661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1031402661 is about 32115.4582872485. The cubic root of 1031402661 is about 1010.3598564123.

Adding to 1031402661 its reverse (1662041301), we get a palindrome (2693443962).

The spelling of 1031402661 in words is "one billion, thirty-one million, four hundred two thousand, six hundred sixty-one".