155442457 has 8 divisors (see below), whose sum is σ = 158594760. Its totient is φ = 152309760.

The previous prime is 155442451. The next prime is 155442473. The reversal of 155442457 is 754244551.

155442457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2944656 + 152497801 = 1716^2 + 12349^2 .

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 155442457 - 2¹¹ = 155440409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155442451) 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, 11673 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (19824345).

Almost surely, 2^155442457 is an apocalyptic number.

It is an amenable number.

155442457 is a deficient number, since it is larger than the sum of its proper divisors (3152303).

155442457 is an equidigital number, since it uses as much as digits as its factorization.

155442457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803.

The product of its digits is 112000, while the sum is 37.

The square root of 155442457 is about 12467.6564357541. The cubic root of 155442457 is about 537.6791767526.

The spelling of 155442457 in words is "one hundred fifty-five million, four hundred forty-two thousand, four hundred fifty-seven".