1401044581 has 2 divisors, whose sum is σ = 1401044582. Its totient is φ = 1401044580.

The previous prime is 1401044527. The next prime is 1401044587. The reversal of 1401044581 is 1854401041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347257025 + 53787556 = 36705^2 + 7334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401044581 - 2¹⁹ = 1400520293 is a prime.

It is a super-2 number, since 2×1401044581² = 3925851835898931122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401044587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700522290 + 700522291.

It is an arithmetic number, because the mean of its divisors is an integer number (700522291).

Almost surely, 2^1401044581 is an apocalyptic number.

It is an amenable number.

1401044581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401044581 is an equidigital number, since it uses as much as digits as its factorization.

1401044581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1401044581 is about 37430.5300657097. The cubic root of 1401044581 is about 1118.9671017723.

The spelling of 1401044581 in words is "one billion, four hundred one million, forty-four thousand, five hundred eighty-one".