157420273 has 4 divisors (see below), whose sum is σ = 157454308. Its totient is φ = 157386240.

The previous prime is 157420267. The next prime is 157420309. The reversal of 157420273 is 372024751.

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 106254864 + 51165409 = 10308^2 + 7153^2 .

It is a cyclic number.

It is not a de Polignac number, because 157420273 - 2⁹ = 157419761 is a prime.

It is a super-2 number, since 2×157420273² = 49562284702789058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157420253) 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, 8736 + ... + 19777.

It is an arithmetic number, because the mean of its divisors is an integer number (39363577).

Almost surely, 2^157420273 is an apocalyptic number.

It is an amenable number.

157420273 is a deficient number, since it is larger than the sum of its proper divisors (34035).

157420273 is an equidigital number, since it uses as much as digits as its factorization.

157420273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34034.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 157420273 is about 12546.7235962222. The cubic root of 157420273 is about 539.9500102329.

The spelling of 157420273 in words is "one hundred fifty-seven million, four hundred twenty thousand, two hundred seventy-three".