1200642465 has 48 divisors (see below), whose sum is σ = 2120203008. Its totient is φ = 579744000.

The previous prime is 1200642463. The next prime is 1200642497. The reversal of 1200642465 is 5642460021.

It is not a de Polignac number, because 1200642465 - 2¹ = 1200642463 is a prime.

It is a super-2 number, since 2×1200642465² = 2883084657522552450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200642463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 490645 + ... + 493085.

It is an arithmetic number, because the mean of its divisors is an integer number (44170896).

Almost surely, 2^1200642465 is an apocalyptic number.

1200642465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200642465 is a deficient number, since it is larger than the sum of its proper divisors (919560543).

1200642465 is a wasteful number, since it uses less digits than its factorization.

1200642465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1200642465 is about 34650.2880940404. The cubic root of 1200642465 is about 1062.8481800531.

The spelling of 1200642465 in words is "one billion, two hundred million, six hundred forty-two thousand, four hundred sixty-five".