1401025489 has 2 divisors, whose sum is σ = 1401025490. Its totient is φ = 1401025488.

The previous prime is 1401025393. The next prime is 1401025511. The reversal of 1401025489 is 9845201041.

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., 1356669889 + 44355600 = 36833^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401025489 - 2²⁷ = 1266807761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1401023489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700512744 + 700512745.

It is an arithmetic number, because the mean of its divisors is an integer number (700512745).

Almost surely, 2^1401025489 is an apocalyptic number.

It is an amenable number.

1401025489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401025489 is an equidigital number, since it uses as much as digits as its factorization.

1401025489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1401025489 is about 37430.2750323852. The cubic root of 1401025489 is about 1118.9620190368.

The spelling of 1401025489 in words is "one billion, four hundred one million, twenty-five thousand, four hundred eighty-nine".