1143123402 has 32 divisors (see below), whose sum is σ = 2299543488. Its totient is φ = 378832896.

The previous prime is 1143123383. The next prime is 1143123409. The reversal of 1143123402 is 2043213411.

It is a super-2 number, since 2×1143123402² = 2613462224400107208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143123409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990858 + ... + 992010.

It is an arithmetic number, because the mean of its divisors is an integer number (71860734).

Almost surely, 2^1143123402 is an apocalyptic number.

1143123402 is an abundant number, since it is smaller than the sum of its proper divisors (1156420086).

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

1143123402 is a wasteful number, since it uses less digits than its factorization.

1143123402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1143123402 is about 33810.1079856306. The cubic root of 1143123402 is about 1045.5971044783.

Adding to 1143123402 its reverse (2043213411), we get a palindrome (3186336813).

Subtracting 1143123402 from its reverse (2043213411), we obtain a palindrome (900090009).

The spelling of 1143123402 in words is "one billion, one hundred forty-three million, one hundred twenty-three thousand, four hundred two".