154970261 has 2 divisors, whose sum is σ = 154970262. Its totient is φ = 154970260.

The previous prime is 154970239. The next prime is 154970279. The reversal of 154970261 is 162079451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 9647236 = 12055^2 + 3106^2 .

It is an emirp because it is prime and its reverse (162079451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154970261 - 2⁶ = 154970197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154900261) 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, 77485130 + 77485131.

It is an arithmetic number, because the mean of its divisors is an integer number (77485131).

Almost surely, 2^154970261 is an apocalyptic number.

It is an amenable number.

154970261 is a deficient number, since it is larger than the sum of its proper divisors (1).

154970261 is an equidigital number, since it uses as much as digits as its factorization.

154970261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 154970261 is about 12448.7051937139. The cubic root of 154970261 is about 537.1341787701.

The spelling of 154970261 in words is "one hundred fifty-four million, nine hundred seventy thousand, two hundred sixty-one".