155286457 has 4 divisors (see below), whose sum is σ = 155426596. Its totient is φ = 155146320.

The previous prime is 155286451. The next prime is 155286479. The reversal of 155286457 is 754682551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46730896 + 108555561 = 6836^2 + 10419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155286457 is a prime.

It is a super-2 number, since 2×155286457² = 48227767455225698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155286451) 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, 68394 + ... + 70627.

It is an arithmetic number, because the mean of its divisors is an integer number (38856649).

Almost surely, 2^155286457 is an apocalyptic number.

It is an amenable number.

155286457 is a deficient number, since it is larger than the sum of its proper divisors (140139).

155286457 is a wasteful number, since it uses less digits than its factorization.

155286457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140138.

The product of its digits is 336000, while the sum is 43.

The square root of 155286457 is about 12461.3986775161. The cubic root of 155286457 is about 537.4992473038.

The spelling of 155286457 in words is "one hundred fifty-five million, two hundred eighty-six thousand, four hundred fifty-seven".