1401249999 has 16 divisors (see below), whose sum is σ = 1955745792. Its totient is φ = 890718048.

The previous prime is 1401249959. The next prime is 1401250001. The reversal of 1401249999 is 9999421041.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1401249999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401249929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10159 + ... + 53904.

It is an arithmetic number, because the mean of its divisors is an integer number (122234112).

Almost surely, 2^1401249999 is an apocalyptic number.

1401249999 is a deficient number, since it is larger than the sum of its proper divisors (554495793).

1401249999 is a wasteful number, since it uses less digits than its factorization.

1401249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64406.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 1401249999 is about 37433.2739551325. The cubic root of 1401249999 is about 1119.0217859116.

The spelling of 1401249999 in words is "one billion, four hundred one million, two hundred forty-nine thousand, nine hundred ninety-nine".