1201540465 has 16 divisors (see below), whose sum is σ = 1479461760. Its totient is φ = 936234880.

The previous prime is 1201540429. The next prime is 1201540471. The reversal of 1201540465 is 5640451021.

It is not a de Polignac number, because 1201540465 - 2⁷ = 1201540337 is a prime.

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, 128106 + ... + 137164.

It is an arithmetic number, because the mean of its divisors is an integer number (92466360).

Almost surely, 2^1201540465 is an apocalyptic number.

It is an amenable number.

1201540465 is a deficient number, since it is larger than the sum of its proper divisors (277921295).

1201540465 is an equidigital number, since it uses as much as digits as its factorization.

1201540465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9752.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1201540465 is about 34663.2437172288. The cubic root of 1201540465 is about 1063.1130937252.

Adding to 1201540465 its reverse (5640451021), we get a palindrome (6841991486).

It can be divided in two parts, 1201 and 540465, that multiplied together give a triangular number (649098465 = T₃₆₀₃₀).

The spelling of 1201540465 in words is "one billion, two hundred one million, five hundred forty thousand, four hundred sixty-five".