155402745 has 8 divisors (see below), whose sum is σ = 248644416. Its totient is φ = 82881456.

The previous prime is 155402719. The next prime is 155402747. The reversal of 155402745 is 547204551.

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

It is not a de Polignac number, because 155402745 - 2⁵ = 155402713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155402747) 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 in 7 ways as a sum of consecutive naturals, for example, 5180077 + ... + 5180106.

It is an arithmetic number, because the mean of its divisors is an integer number (31080552).

Almost surely, 2^155402745 is an apocalyptic number.

155402745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155402745 is a deficient number, since it is larger than the sum of its proper divisors (93241671).

155402745 is a wasteful number, since it uses less digits than its factorization.

155402745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10360191.

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 155402745 is about 12466.0637331918. The cubic root of 155402745 is about 537.6333846002.

The spelling of 155402745 in words is "one hundred fifty-five million, four hundred two thousand, seven hundred forty-five".