123401031 has 16 divisors (see below), whose sum is σ = 181982304. Its totient is φ = 73885824.

The previous prime is 123401027. The next prime is 123401041. The reversal of 123401031 is 130104321.

It is not a de Polignac number, because 123401031 - 2² = 123401027 is a prime.

It is a super-2 number, since 2×123401031² = 30455628903725922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123401031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123401041) 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 15 ways as a sum of consecutive naturals, for example, 41316 + ... + 44201.

It is an arithmetic number, because the mean of its divisors is an integer number (11373894).

Almost surely, 2^123401031 is an apocalyptic number.

123401031 is a deficient number, since it is larger than the sum of its proper divisors (58581273).

123401031 is a wasteful number, since it uses less digits than its factorization.

123401031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85570.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123401031 is about 11108.6016671767. The cubic root of 123401031 is about 497.8588856798.

Adding to 123401031 its reverse (130104321), we get a palindrome (253505352).

It can be divided in two parts, 12 and 3401031, that added together give a palindrome (3401043).

The spelling of 123401031 in words is "one hundred twenty-three million, four hundred one thousand, thirty-one".