1550161 has 2 divisors, whose sum is σ = 1550162. Its totient is φ = 1550160.

The previous prime is 1550147. The next prime is 1550167. The reversal of 1550161 is 1610551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844561 + 705600 = 919^2 + 840^2 .

It is an emirp because it is prime and its reverse (1610551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1550161 - 2⁷ = 1550033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1550167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775080 + 775081.

It is an arithmetic number, because the mean of its divisors is an integer number (775081).

2^1550161 is an apocalyptic number.

It is an amenable number.

1550161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550161 is an equidigital number, since it uses as much as digits as its factorization.

1550161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1550161 is about 1245.0546172759. The cubic root of 1550161 is about 115.7334595643.

It can be divided in two parts, 1550 and 161, that added together give a triangular number (1711 = T₅₈).

The spelling of 1550161 in words is "one million, five hundred fifty thousand, one hundred sixty-one".