1265143350 has 24 divisors (see below), whose sum is σ = 3137555880. Its totient is φ = 337371520.

The previous prime is 1265143343. The next prime is 1265143421. The reversal of 1265143350 is 533415621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4216995 + ... + 4217294.

It is an arithmetic number, because the mean of its divisors is an integer number (130731495).

Almost surely, 2^1265143350 is an apocalyptic number.

1265143350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265143350 is an abundant number, since it is smaller than the sum of its proper divisors (1872412530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265143350 is a wasteful number, since it uses less digits than its factorization.

1265143350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434304 (or 8434299 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1265143350 is about 35568.8536503498. The cubic root of 1265143350 is about 1081.5499436279.

Adding to 1265143350 its reverse (533415621), we get a palindrome (1798558971).

The spelling of 1265143350 in words is "one billion, two hundred sixty-five million, one hundred forty-three thousand, three hundred fifty".