1405776401 has 2 divisors, whose sum is σ = 1405776402. Its totient is φ = 1405776400.

The previous prime is 1405776373. The next prime is 1405776413. The reversal of 1405776401 is 1046775041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1137308176 + 268468225 = 33724^2 + 16385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405776401 - 2¹⁴ = 1405760017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405776451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702888200 + 702888201.

It is an arithmetic number, because the mean of its divisors is an integer number (702888201).

Almost surely, 2^1405776401 is an apocalyptic number.

It is an amenable number.

1405776401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405776401 is an equidigital number, since it uses as much as digits as its factorization.

1405776401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1405776401 is about 37493.6848149125. The cubic root of 1405776401 is about 1120.2254013290.

The spelling of 1405776401 in words is "one billion, four hundred five million, seven hundred seventy-six thousand, four hundred one".