1265243497 has 8 divisors (see below), whose sum is σ = 1522097600. Its totient is φ = 1027415664.

The previous prime is 1265243449. The next prime is 1265243531. The reversal of 1265243497 is 7943425621.

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 1265243497 - 2¹¹ = 1265241449 is a prime.

It is a super-2 number, since 2×1265243497² = 3201682213401578018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265243417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4756422 + ... + 4756687.

It is an arithmetic number, because the mean of its divisors is an integer number (190262200).

Almost surely, 2^1265243497 is an apocalyptic number.

1265243497 is the 20537-th hex number.

It is an amenable number.

1265243497 is a deficient number, since it is larger than the sum of its proper divisors (256854103).

1265243497 is an equidigital number, since it uses as much as digits as its factorization.

1265243497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9513135.

The product of its digits is 362880, while the sum is 43.

The square root of 1265243497 is about 35570.2614131524. The cubic root of 1265243497 is about 1081.5784808748.

The spelling of 1265243497 in words is "one billion, two hundred sixty-five million, two hundred forty-three thousand, four hundred ninety-seven".