1401123431 has 2 divisors, whose sum is σ = 1401123432. Its totient is φ = 1401123430.

The previous prime is 1401123401. The next prime is 1401123467. The reversal of 1401123431 is 1343211041.

It is a weak prime.

It is an emirp because it is prime and its reverse (1343211041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401123431 is a prime.

It is a super-2 number, since 2×1401123431² = 3926293737794423522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401123401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700561715 + 700561716.

It is an arithmetic number, because the mean of its divisors is an integer number (700561716).

Almost surely, 2^1401123431 is an apocalyptic number.

1401123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401123431 is an equidigital number, since it uses as much as digits as its factorization.

1401123431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1401123431 is about 37431.5833354669. The cubic root of 1401123431 is about 1118.9880929913.

Adding to 1401123431 its reverse (1343211041), we get a palindrome (2744334472).

The spelling of 1401123431 in words is "one billion, four hundred one million, one hundred twenty-three thousand, four hundred thirty-one".