1321633142 has 16 divisors (see below), whose sum is σ = 2100420720. Its totient is φ = 621543168.

The previous prime is 1321633139. The next prime is 1321633147. The reversal of 1321633142 is 2413361231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321633147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44609 + ... + 68067.

It is an arithmetic number, because the mean of its divisors is an integer number (131276295).

Almost surely, 2^1321633142 is an apocalyptic number.

1321633142 is a deficient number, since it is larger than the sum of its proper divisors (778787578).

1321633142 is a wasteful number, since it uses less digits than its factorization.

1321633142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25135.

The product of its digits is 2592, while the sum is 26.

The square root of 1321633142 is about 36354.2726787375. The cubic root of 1321633142 is about 1097.4135214125.

Adding to 1321633142 its reverse (2413361231), we get a palindrome (3734994373).

The spelling of 1321633142 in words is "one billion, three hundred twenty-one million, six hundred thirty-three thousand, one hundred forty-two".