137875261 has 2 divisors, whose sum is σ = 137875262. Its totient is φ = 137875260.

The previous prime is 137875249. The next prime is 137875277. The reversal of 137875261 is 162578731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103652761 + 34222500 = 10181^2 + 5850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137875261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137875211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68937630 + 68937631.

It is an arithmetic number, because the mean of its divisors is an integer number (68937631).

Almost surely, 2^137875261 is an apocalyptic number.

It is an amenable number.

137875261 is a deficient number, since it is larger than the sum of its proper divisors (1).

137875261 is an equidigital number, since it uses as much as digits as its factorization.

137875261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 137875261 is about 11742.0296797445. The cubic root of 137875261 is about 516.6091760288.

The spelling of 137875261 in words is "one hundred thirty-seven million, eight hundred seventy-five thousand, two hundred sixty-one".