1401542231 has 4 divisors (see below), whose sum is σ = 1401682464. Its totient is φ = 1401402000.

The previous prime is 1401542173. The next prime is 1401542279. The reversal of 1401542231 is 1322451041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401542231 is a prime.

It is a super-2 number, since 2×1401542231² = 3928641250552914722, 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 = 1401542197 and 1401542206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401542291) 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, 53870 + ... + 75531.

It is an arithmetic number, because the mean of its divisors is an integer number (350420616).

Almost surely, 2^1401542231 is an apocalyptic number.

1401542231 is a deficient number, since it is larger than the sum of its proper divisors (140233).

1401542231 is a wasteful number, since it uses less digits than its factorization.

1401542231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140232.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1401542231 is about 37437.1771238164. The cubic root of 1401542231 is about 1119.0995715184.

Adding to 1401542231 its reverse (1322451041), we get a palindrome (2723993272).

The spelling of 1401542231 in words is "one billion, four hundred one million, five hundred forty-two thousand, two hundred thirty-one".