1402123156 has 12 divisors (see below), whose sum is σ = 2804246368. Its totient is φ = 600909912.

The previous prime is 1402123061. The next prime is 1402123157. The reversal of 1402123156 is 6513212041.

It is a happy number.

1402123156 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1402123156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402123157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25037886 + ... + 25037941.

Almost surely, 2^1402123156 is an apocalyptic number.

It is an amenable number.

1402123156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1402123156 is a wasteful number, since it uses less digits than its factorization.

1402123156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50075838 (or 50075836 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1402123156 is about 37444.9349845877. The cubic root of 1402123156 is about 1119.2541686241.

Adding to 1402123156 its reverse (6513212041), we get a palindrome (7915335197).

The spelling of 1402123156 in words is "one billion, four hundred two million, one hundred twenty-three thousand, one hundred fifty-six".