1202642261 has 2 divisors, whose sum is σ = 1202642262. Its totient is φ = 1202642260.

The previous prime is 1202642219. The next prime is 1202642269. The reversal of 1202642261 is 1622462021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841870225 + 360772036 = 29015^2 + 18994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202642261 - 2²⁶ = 1135533397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202642261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202642269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601321130 + 601321131.

It is an arithmetic number, because the mean of its divisors is an integer number (601321131).

Almost surely, 2^1202642261 is an apocalyptic number.

It is an amenable number.

1202642261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202642261 is an equidigital number, since it uses as much as digits as its factorization.

1202642261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1202642261 is about 34679.1329332208. The cubic root of 1202642261 is about 1063.4379477878.

The spelling of 1202642261 in words is "one billion, two hundred two million, six hundred forty-two thousand, two hundred sixty-one".