155891741 has 2 divisors, whose sum is σ = 155891742. Its totient is φ = 155891740.

The previous prime is 155891731. The next prime is 155891753. The reversal of 155891741 is 147198551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97812100 + 58079641 = 9890^2 + 7621^2 .

It is a cyclic number.

It is not a de Polignac number, because 155891741 - 2¹⁰ = 155890717 is a prime.

It is a super-2 number, since 2×155891741² = 48604469824022162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155891711) 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, 77945870 + 77945871.

It is an arithmetic number, because the mean of its divisors is an integer number (77945871).

Almost surely, 2^155891741 is an apocalyptic number.

It is an amenable number.

155891741 is a deficient number, since it is larger than the sum of its proper divisors (1).

155891741 is an equidigital number, since it uses as much as digits as its factorization.

155891741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 41.

The square root of 155891741 is about 12485.6614162006. The cubic root of 155891741 is about 538.1967064915.

The spelling of 155891741 in words is "one hundred fifty-five million, eight hundred ninety-one thousand, seven hundred forty-one".