1402211257 has 2 divisors, whose sum is σ = 1402211258. Its totient is φ = 1402211256.

The previous prime is 1402211243. The next prime is 1402211269. The reversal of 1402211257 is 7521122041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391215401 + 10995856 = 37299^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402211257 - 2¹⁵ = 1402178489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402211297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701105628 + 701105629.

It is an arithmetic number, because the mean of its divisors is an integer number (701105629).

Almost surely, 2^1402211257 is an apocalyptic number.

It is an amenable number.

1402211257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402211257 is an equidigital number, since it uses as much as digits as its factorization.

1402211257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1402211257 is about 37446.1113735459. Note that the first 3 decimals coincide. The cubic root of 1402211257 is about 1119.2776105369.

Adding to 1402211257 its reverse (7521122041), we get a palindrome (8923333298).

The spelling of 1402211257 in words is "one billion, four hundred two million, two hundred eleven thousand, two hundred fifty-seven".