7561901 has 2 divisors, whose sum is σ = 7561902. Its totient is φ = 7561900.

The previous prime is 7561849. The next prime is 7561903. The reversal of 7561901 is 1091657.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7557001 + 4900 = 2749^2 + 70^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7561901 is a prime.

Together with 7561903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7561903) 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 as a sum of consecutive naturals, namely, 3780950 + 3780951.

It is an arithmetic number, because the mean of its divisors is an integer number (3780951).

Almost surely, 2^7561901 is an apocalyptic number.

It is an amenable number.

7561901 is a deficient number, since it is larger than the sum of its proper divisors (1).

7561901 is an equidigital number, since it uses as much as digits as its factorization.

7561901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 7561901 is about 2749.8910887524. The cubic root of 7561901 is about 196.2804277540.

The spelling of 7561901 in words is "seven million, five hundred sixty-one thousand, nine hundred one".