246139561 has 2 divisors, whose sum is σ = 246139562. Its totient is φ = 246139560.

The previous prime is 246139519. The next prime is 246139591. The reversal of 246139561 is 165931642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157025961 + 89113600 = 12531^2 + 9440^2 .

It is a cyclic number.

It is not a de Polignac number, because 246139561 - 2¹⁹ = 245615273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 246139561.

It is not a weakly prime, because it can be changed into another prime (246139591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123069780 + 123069781.

It is an arithmetic number, because the mean of its divisors is an integer number (123069781).

Almost surely, 2^246139561 is an apocalyptic number.

It is an amenable number.

246139561 is a deficient number, since it is larger than the sum of its proper divisors (1).

246139561 is an equidigital number, since it uses as much as digits as its factorization.

246139561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 246139561 is about 15688.8355527107. The cubic root of 246139561 is about 626.7011244005.

The spelling of 246139561 in words is "two hundred forty-six million, one hundred thirty-nine thousand, five hundred sixty-one".