1031257165 has 16 divisors (see below), whose sum is σ = 1259919360. Its totient is φ = 810097600.

The previous prime is 1031257147. The next prime is 1031257181. The reversal of 1031257165 is 5617521301.

It is not a de Polignac number, because 1031257165 - 2¹³ = 1031248973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382452 + ... + 385138.

It is an arithmetic number, because the mean of its divisors is an integer number (78744960).

Almost surely, 2^1031257165 is an apocalyptic number.

It is an amenable number.

1031257165 is a deficient number, since it is larger than the sum of its proper divisors (228662195).

1031257165 is a wasteful number, since it uses less digits than its factorization.

1031257165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1031257165 is about 32113.1930053677. The cubic root of 1031257165 is about 1010.3123449873.

Adding to 1031257165 its reverse (5617521301), we get a palindrome (6648778466).

The spelling of 1031257165 in words is "one billion, thirty-one million, two hundred fifty-seven thousand, one hundred sixty-five".