1202501009 has 2 divisors, whose sum is σ = 1202501010. Its totient is φ = 1202501008.

The previous prime is 1202500939. The next prime is 1202501011. The reversal of 1202501009 is 9001052021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713958400 + 488542609 = 26720^2 + 22103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202501009 - 2¹⁶ = 1202435473 is a prime.

Together with 1202501011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1202501039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601250504 + 601250505.

It is an arithmetic number, because the mean of its divisors is an integer number (601250505).

Almost surely, 2^1202501009 is an apocalyptic number.

It is an amenable number.

1202501009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202501009 is an equidigital number, since it uses as much as digits as its factorization.

1202501009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1202501009 is about 34677.0963173101. The cubic root of 1202501009 is about 1063.3963120708.

The spelling of 1202501009 in words is "one billion, two hundred two million, five hundred one thousand, nine".