1401543071 has 2 divisors, whose sum is σ = 1401543072. Its totient is φ = 1401543070.

The previous prime is 1401543023. The next prime is 1401543107. The reversal of 1401543071 is 1703451041.

Together with next prime (1401543107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401543071 - 2¹⁸ = 1401280927 is a prime.

It is a super-2 number, since 2×1401543071² = 3928645959736222082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1401543071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401543371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700771535 + 700771536.

It is an arithmetic number, because the mean of its divisors is an integer number (700771536).

Almost surely, 2^1401543071 is an apocalyptic number.

1401543071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401543071 is an equidigital number, since it uses as much as digits as its factorization.

1401543071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1401543071 is about 37437.1883426093. The cubic root of 1401543071 is about 1119.0997950920.

The spelling of 1401543071 in words is "one billion, four hundred one million, five hundred forty-three thousand, seventy-one".