1052431661 has 6 divisors (see below), whose sum is σ = 1075302510. Its totient is φ = 1030037336.

The previous prime is 1052431643. The next prime is 1052431673. The reversal of 1052431661 is 1661342501.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 821968900 + 230462761 = 28670^2 + 15181^2 .

It is not a de Polignac number, because 1052431661 - 2¹⁰ = 1052430637 is a prime.

It is a super-2 number, since 2×1052431661² = 2215224802150437842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052431621) 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 5 ways as a sum of consecutive naturals, for example, 236006 + ... + 240423.

It is an arithmetic number, because the mean of its divisors is an integer number (179217085).

Almost surely, 2^1052431661 is an apocalyptic number.

It is an amenable number.

1052431661 is a deficient number, since it is larger than the sum of its proper divisors (22870849).

1052431661 is an frugal number, since it uses more digits than its factorization.

1052431661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476523 (or 476476 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1052431661 is about 32441.2031373684. The cubic root of 1052431661 is about 1017.1803650432.

The spelling of 1052431661 in words is "one billion, fifty-two million, four hundred thirty-one thousand, six hundred sixty-one".