1044155401 has 4 divisors (see below), whose sum is σ = 1044223252. Its totient is φ = 1044087552.

The previous prime is 1044155383. The next prime is 1044155407. The reversal of 1044155401 is 1045514401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1045514401 = 31 ⋅33726271.

It can be written as a sum of positive squares in 2 ways, for example, as 552203001 + 491952400 = 23499^2 + 22180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044155401 - 2¹⁵ = 1044122633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1044155407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1465 + ... + 45721.

It is an arithmetic number, because the mean of its divisors is an integer number (261055813).

Almost surely, 2^1044155401 is an apocalyptic number.

It is an amenable number.

1044155401 is a deficient number, since it is larger than the sum of its proper divisors (67851).

1044155401 is an equidigital number, since it uses as much as digits as its factorization.

1044155401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67850.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1044155401 is about 32313.3935234293. The cubic root of 1044155401 is about 1014.5069963761.

Adding to 1044155401 its reverse (1045514401), we get a palindrome (2089669802).

The spelling of 1044155401 in words is "one billion, forty-four million, one hundred fifty-five thousand, four hundred one".