1401551279 has 2 divisors, whose sum is σ = 1401551280. Its totient is φ = 1401551278.

The previous prime is 1401551269. The next prime is 1401551293. The reversal of 1401551279 is 9721551041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401551279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401551269) 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, 700775639 + 700775640.

It is an arithmetic number, because the mean of its divisors is an integer number (700775640).

Almost surely, 2^1401551279 is an apocalyptic number.

1401551279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401551279 is an equidigital number, since it uses as much as digits as its factorization.

1401551279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 1401551279 is about 37437.2979660659. The cubic root of 1401551279 is about 1119.1019797206.

The spelling of 1401551279 in words is "one billion, four hundred one million, five hundred fifty-one thousand, two hundred seventy-nine".