155042765 has 8 divisors (see below), whose sum is σ = 191079960. Its totient is φ = 120681792.

The previous prime is 155042761. The next prime is 155042779. The reversal of 155042765 is 567240551.

It can be written as a sum of positive squares in 4 ways, for example, as 78340201 + 76702564 = 8851^2 + 8758^2 .

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 155042765 - 2² = 155042761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155042761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418850 + ... + 419219.

It is an arithmetic number, because the mean of its divisors is an integer number (23884995).

Almost surely, 2^155042765 is an apocalyptic number.

It is an amenable number.

155042765 is a deficient number, since it is larger than the sum of its proper divisors (36037195).

155042765 is an equidigital number, since it uses as much as digits as its factorization.

155042765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838111.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 155042765 is about 12451.6169632703. The cubic root of 155042765 is about 537.2179331290.

The spelling of 155042765 in words is "one hundred fifty-five million, forty-two thousand, seven hundred sixty-five".