427440157 has 2 divisors, whose sum is σ = 427440158. Its totient is φ = 427440156.

The previous prime is 427440149. The next prime is 427440187. The reversal of 427440157 is 751044724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226622916 + 200817241 = 15054^2 + 14171^2 .

It is a cyclic number.

It is not a de Polignac number, because 427440157 - 2³ = 427440149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427440107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213720078 + 213720079.

It is an arithmetic number, because the mean of its divisors is an integer number (213720079).

Almost surely, 2^427440157 is an apocalyptic number.

It is an amenable number.

427440157 is a deficient number, since it is larger than the sum of its proper divisors (1).

427440157 is an equidigital number, since it uses as much as digits as its factorization.

427440157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 427440157 is about 20674.6259216461. The cubic root of 427440157 is about 753.2834748940.

The spelling of 427440157 in words is "four hundred twenty-seven million, four hundred forty thousand, one hundred fifty-seven".