155742485 has 8 divisors (see below), whose sum is σ = 187158840. Its totient is φ = 124415424.

The previous prime is 155742473. The next prime is 155742511. The reversal of 155742485 is 584247551.

It can be written as a sum of positive squares in 4 ways, for example, as 4919524 + 150822961 = 2218^2 + 12281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155742485 - 2⁴ = 155742469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18422 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (23394855).

Almost surely, 2^155742485 is an apocalyptic number.

It is an amenable number.

155742485 is a deficient number, since it is larger than the sum of its proper divisors (31416355).

155742485 is an equidigital number, since it uses as much as digits as its factorization.

155742485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44647.

The product of its digits is 224000, while the sum is 41.

The square root of 155742485 is about 12479.6828885994. The cubic root of 155742485 is about 538.0248890979.

The spelling of 155742485 in words is "one hundred fifty-five million, seven hundred forty-two thousand, four hundred eighty-five".