155142361 has 4 divisors (see below), whose sum is σ = 169246224. Its totient is φ = 141038500.

The previous prime is 155142341. The next prime is 155142367. The reversal of 155142361 is 163241551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155142361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155142367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7051915 + ... + 7051936.

It is an arithmetic number, because the mean of its divisors is an integer number (42311556).

Almost surely, 2^155142361 is an apocalyptic number.

155142361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155142361 is a deficient number, since it is larger than the sum of its proper divisors (14103863).

155142361 is a wasteful number, since it uses less digits than its factorization.

155142361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103862.

The product of its digits is 3600, while the sum is 28.

The square root of 155142361 is about 12455.6156411476. The cubic root of 155142361 is about 537.3329407628.

The spelling of 155142361 in words is "one hundred fifty-five million, one hundred forty-two thousand, three hundred sixty-one".