1202541721 has 2 divisors, whose sum is σ = 1202541722. Its totient is φ = 1202541720.

The previous prime is 1202541647. The next prime is 1202541727. The reversal of 1202541721 is 1271452021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036131721 + 166410000 = 32189^2 + 12900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202541721 - 2⁹ = 1202541209 is a prime.

It is a super-2 number, since 2×1202541721² = 2892213181491283682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1202541727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601270860 + 601270861.

It is an arithmetic number, because the mean of its divisors is an integer number (601270861).

Almost surely, 2^1202541721 is an apocalyptic number.

It is an amenable number.

1202541721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202541721 is an equidigital number, since it uses as much as digits as its factorization.

1202541721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1202541721 is about 34677.6833280425. The cubic root of 1202541721 is about 1063.4083127543.

Adding to 1202541721 its reverse (1271452021), we get a palindrome (2473993742).

The spelling of 1202541721 in words is "one billion, two hundred two million, five hundred forty-one thousand, seven hundred twenty-one".