157445 has 4 divisors (see below), whose sum is σ = 188940. Its totient is φ = 125952.

The previous prime is 157433. The next prime is 157457. The reversal of 157445 is 544751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544751 = 37 ⋅14723.

It is an interprime number because it is at equal distance from previous prime (157433) and next prime (157457).

It can be written as a sum of positive squares in 2 ways, for example, as 75076 + 82369 = 274^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 157445 - 2⁴ = 157429 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15740 + ... + 15749.

It is an arithmetic number, because the mean of its divisors is an integer number (47235).

2¹⁵⁷⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

157445 is a deficient number, since it is larger than the sum of its proper divisors (31495).

157445 is an equidigital number, since it uses as much as digits as its factorization.

157445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31494.

The product of its digits is 2800, while the sum is 26.

The square root of 157445 is about 396.7933971225. The cubic root of 157445 is about 53.9978279876.

The spelling of 157445 in words is "one hundred fifty-seven thousand, four hundred forty-five".