1401023431 has 4 divisors (see below), whose sum is σ = 1483436592. Its totient is φ = 1318610272.

The previous prime is 1401023297. The next prime is 1401023461. The reversal of 1401023431 is 1343201041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401023431 - 2⁹ = 1401022919 is a prime.

It is a super-2 number, since 2×1401023431² = 3925733308422023522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401023399 and 1401023408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401023461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41206555 + ... + 41206588.

It is an arithmetic number, because the mean of its divisors is an integer number (370859148).

Almost surely, 2^1401023431 is an apocalyptic number.

1401023431 is a deficient number, since it is larger than the sum of its proper divisors (82413161).

1401023431 is an equidigital number, since it uses as much as digits as its factorization.

1401023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82413160.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1401023431 is about 37430.2475412600. The cubic root of 1401023431 is about 1118.9614711465.

Adding to 1401023431 its reverse (1343201041), we get a palindrome (2744224472).

The spelling of 1401023431 in words is "one billion, four hundred one million, twenty-three thousand, four hundred thirty-one".