155402141 has 2 divisors, whose sum is σ = 155402142. Its totient is φ = 155402140.

The previous prime is 155402131. The next prime is 155402161. The reversal of 155402141 is 141204551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90535225 + 64866916 = 9515^2 + 8054^2 .

It is a cyclic number.

It is not a de Polignac number, because 155402141 - 2¹⁰ = 155401117 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155402111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77701070 + 77701071.

It is an arithmetic number, because the mean of its divisors is an integer number (77701071).

Almost surely, 2^155402141 is an apocalyptic number.

It is an amenable number.

155402141 is a deficient number, since it is larger than the sum of its proper divisors (1).

155402141 is an equidigital number, since it uses as much as digits as its factorization.

155402141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 155402141 is about 12466.0395073977. The cubic root of 155402141 is about 537.6326880638.

Adding to 155402141 its reverse (141204551), we get a palindrome (296606692).

The spelling of 155402141 in words is "one hundred fifty-five million, four hundred two thousand, one hundred forty-one".