1202362561 has 4 divisors (see below), whose sum is σ = 1202811732. Its totient is φ = 1201913392.

The previous prime is 1202362529. The next prime is 1202362571. The reversal of 1202362561 is 1652632021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652632021 = 139 ⋅11889439.

It can be written as a sum of positive squares in 2 ways, for example, as 632824336 + 569538225 = 25156^2 + 23865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202362561 - 2⁵ = 1202362529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202362571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220546 + ... + 225931.

It is an arithmetic number, because the mean of its divisors is an integer number (300702933).

Almost surely, 2^1202362561 is an apocalyptic number.

It is an amenable number.

1202362561 is a deficient number, since it is larger than the sum of its proper divisors (449171).

1202362561 is an equidigital number, since it uses as much as digits as its factorization.

1202362561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449170.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1202362561 is about 34675.1000142754. The cubic root of 1202362561 is about 1063.3554997022.

Adding to 1202362561 its reverse (1652632021), we get a palindrome (2854994582).

The spelling of 1202362561 in words is "one billion, two hundred two million, three hundred sixty-two thousand, five hundred sixty-one".