123401402 has 16 divisors (see below), whose sum is σ = 196440552. Its totient is φ = 57937920.

The previous prime is 123401381. The next prime is 123401423. The reversal of 123401402 is 204104321.

It is an interprime number because it is at equal distance from previous prime (123401381) and next prime (123401423).

It can be written as a sum of positive squares in 4 ways, for example, as 79192201 + 44209201 = 8899^2 + 6649^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11738 + ... + 19610.

Almost surely, 2^123401402 is an apocalyptic number.

123401402 is a deficient number, since it is larger than the sum of its proper divisors (73039150).

123401402 is a wasteful number, since it uses less digits than its factorization.

123401402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8353.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123401402 is about 11108.6183659355. The cubic root of 123401402 is about 497.8593846099.

Adding to 123401402 its reverse (204104321), we get a palindrome (327505723).

The spelling of 123401402 in words is "one hundred twenty-three million, four hundred one thousand, four hundred two".