1420357 has 2 divisors, whose sum is σ = 1420358. Its totient is φ = 1420356.

The previous prime is 1420303. The next prime is 1420369. The reversal of 1420357 is 7530241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 408321 = 1006^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420357 - 2¹⁹ = 896069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710178 + 710179.

It is an arithmetic number, because the mean of its divisors is an integer number (710179).

2^1420357 is an apocalyptic number.

It is an amenable number.

1420357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420357 is an equidigital number, since it uses as much as digits as its factorization.

1420357 is an evil number, because the sum of its binary digits is even.

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

The square root of 1420357 is about 1191.7873132401. The cubic root of 1420357 is about 112.4085050322.

Adding to 1420357 its reverse (7530241), we get a palindrome (8950598).

The spelling of 1420357 in words is "one million, four hundred twenty thousand, three hundred fifty-seven".