1272040465 has 8 divisors (see below), whose sum is σ = 1526901120. Its totient is φ = 1017330672.

The previous prime is 1272040463. The next prime is 1272040489. The reversal of 1272040465 is 5640402721.

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 1272040465 - 2¹ = 1272040463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1272040463) 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, 18249 + ... + 53638.

It is an arithmetic number, because the mean of its divisors is an integer number (190862640).

Almost surely, 2^1272040465 is an apocalyptic number.

It is an amenable number.

1272040465 is a deficient number, since it is larger than the sum of its proper divisors (254860655).

1272040465 is an equidigital number, since it uses as much as digits as its factorization.

1272040465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75431.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1272040465 is about 35665.6762868728. The cubic root of 1272040465 is about 1083.5117923494.

The spelling of 1272040465 in words is "one billion, two hundred seventy-two million, forty thousand, four hundred sixty-five".