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157423 = 743523
BaseRepresentation
bin100110011011101111
321222221111
4212123233
520014143
63212451
71223650
oct463357
9258844
10157423
11a8302
1277127
1356866
1441527
153199d
hex266ef

157423 has 8 divisors (see below), whose sum is σ = 184448. Its totient is φ = 131544.

The previous prime is 157411. The next prime is 157427. The reversal of 157423 is 324751.

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

It is a de Polignac number, because none of the positive numbers 2k-157423 is a prime.

It is a Duffinian number.

157423 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 157394 and 157403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157427) 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, 40 + ... + 562.

It is an arithmetic number, because the mean of its divisors is an integer number (23056).

157423 is a Friedman number, since it can be written as (7^2+5)^3-41, using all its digits and the basic arithmetic operations.

2157423 is an apocalyptic number.

157423 is a deficient number, since it is larger than the sum of its proper divisors (27025).

157423 is an equidigital number, since it uses as much as digits as its factorization.

157423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573.

The product of its digits is 840, while the sum is 22.

The square root of 157423 is about 396.7656739185. The cubic root of 157423 is about 53.9953128076.

The spelling of 157423 in words is "one hundred fifty-seven thousand, four hundred twenty-three".

Divisors: 1 7 43 301 523 3661 22489 157423