1406702257 has 2 divisors, whose sum is σ = 1406702258. Its totient is φ = 1406702256.

The previous prime is 1406702243. The next prime is 1406702263. The reversal of 1406702257 is 7522076041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1126340721 + 280361536 = 33561^2 + 16744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1406702257 is a prime.

It is a super-2 number, since 2×1406702257² = 3957622479697788098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1406702237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703351128 + 703351129.

It is an arithmetic number, because the mean of its divisors is an integer number (703351129).

Almost surely, 2^1406702257 is an apocalyptic number.

It is an amenable number.

1406702257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406702257 is an equidigital number, since it uses as much as digits as its factorization.

1406702257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1406702257 is about 37506.0296085843. The cubic root of 1406702257 is about 1120.4712772725.

Adding to 1406702257 its reverse (7522076041), we get a palindrome (8928778298).

The spelling of 1406702257 in words is "one billion, four hundred six million, seven hundred two thousand, two hundred fifty-seven".