1401249247 has 2 divisors, whose sum is σ = 1401249248. Its totient is φ = 1401249246.

The previous prime is 1401249167. The next prime is 1401249257. The reversal of 1401249247 is 7429421041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401249247 - 2⁷ = 1401249119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401249257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700624623 + 700624624.

It is an arithmetic number, because the mean of its divisors is an integer number (700624624).

Almost surely, 2^1401249247 is an apocalyptic number.

1401249247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401249247 is an equidigital number, since it uses as much as digits as its factorization.

1401249247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1401249247 is about 37433.2639105916. The cubic root of 1401249247 is about 1119.0215857321.

The spelling of 1401249247 in words is "one billion, four hundred one million, two hundred forty-nine thousand, two hundred forty-seven".