1401681263 has 4 divisors (see below), whose sum is σ = 1484133120. Its totient is φ = 1319229408.

The previous prime is 1401681257. The next prime is 1401681269. The reversal of 1401681263 is 3621861041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3621861041 = 1063 ⋅3407207.

It is an interprime number because it is at equal distance from previous prime (1401681257) and next prime (1401681269).

It is a cyclic number.

It is not a de Polignac number, because 1401681263 - 2⁶ = 1401681199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401681269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41225903 + ... + 41225936.

It is an arithmetic number, because the mean of its divisors is an integer number (371033280).

Almost surely, 2^1401681263 is an apocalyptic number.

1401681263 is a deficient number, since it is larger than the sum of its proper divisors (82451857).

1401681263 is an equidigital number, since it uses as much as digits as its factorization.

1401681263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82451856.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1401681263 is about 37439.0339485409. The cubic root of 1401681263 is about 1119.1365749240.

The spelling of 1401681263 in words is "one billion, four hundred one million, six hundred eighty-one thousand, two hundred sixty-three".