1402449857 has 2 divisors, whose sum is σ = 1402449858. Its totient is φ = 1402449856.

The previous prime is 1402449847. The next prime is 1402449871. The reversal of 1402449857 is 7589442041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 862538161 + 539911696 = 29369^2 + 23236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402449857 - 2¹⁰ = 1402448833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402449847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701224928 + 701224929.

It is an arithmetic number, because the mean of its divisors is an integer number (701224929).

Almost surely, 2^1402449857 is an apocalyptic number.

It is an amenable number.

1402449857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402449857 is an equidigital number, since it uses as much as digits as its factorization.

1402449857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 1402449857 is about 37449.2971496128. The cubic root of 1402449857 is about 1119.3410922913.

The spelling of 1402449857 in words is "one billion, four hundred two million, four hundred forty-nine thousand, eight hundred fifty-seven".