1400242631 has 4 divisors (see below), whose sum is σ = 1406879064. Its totient is φ = 1393606200.

The previous prime is 1400242603. The next prime is 1400242643. The reversal of 1400242631 is 1362420041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1362420041 = 43 ⋅31684187.

It is a cyclic number.

It is not a de Polignac number, because 1400242631 - 2¹⁸ = 1399980487 is a prime.

It is a super-2 number, since 2×1400242631² = 3921358851339604322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400242597 and 1400242606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400242661) 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, 3317900 + ... + 3318321.

It is an arithmetic number, because the mean of its divisors is an integer number (351719766).

Almost surely, 2^1400242631 is an apocalyptic number.

1400242631 is a deficient number, since it is larger than the sum of its proper divisors (6636433).

1400242631 is an equidigital number, since it uses as much as digits as its factorization.

1400242631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6636432.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1400242631 is about 37419.8160203922. The cubic root of 1400242631 is about 1118.7535642095.

Adding to 1400242631 its reverse (1362420041), we get a palindrome (2762662672).

The spelling of 1400242631 in words is "one billion, four hundred million, two hundred forty-two thousand, six hundred thirty-one".