123401156 has 6 divisors (see below), whose sum is σ = 215952030. Its totient is φ = 61700576.

The previous prime is 123401153. The next prime is 123401167. The reversal of 123401156 is 651104321.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 3936256 = 10930^2 + 1984^2 .

It is not an unprimeable number, because it can be changed into a prime (123401153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15425141 + ... + 15425148.

It is an arithmetic number, because the mean of its divisors is an integer number (35992005).

Almost surely, 2^123401156 is an apocalyptic number.

It is an amenable number.

123401156 is a deficient number, since it is larger than the sum of its proper divisors (92550874).

123401156 is a wasteful number, since it uses less digits than its factorization.

123401156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30850293 (or 30850291 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 123401156 is about 11108.6072934459. The cubic root of 123401156 is about 497.8590537831.

Adding to 123401156 its reverse (651104321), we get a palindrome (774505477).

The spelling of 123401156 in words is "one hundred twenty-three million, four hundred one thousand, one hundred fifty-six".