1242133431 has 32 divisors (see below), whose sum is σ = 2099865600. Its totient is φ = 634320480.

The previous prime is 1242133421. The next prime is 1242133433. The reversal of 1242133431 is 1343312421.

It is a happy number.

1242133431 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1242133431 - 2⁶ = 1242133367 is a prime.

It is a super-4 number, since 4×1242133431⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242133433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31941 + ... + 59198.

It is an arithmetic number, because the mean of its divisors is an integer number (65620800).

Almost surely, 2^1242133431 is an apocalyptic number.

1242133431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1242133431 is a deficient number, since it is larger than the sum of its proper divisors (857732169).

1242133431 is a wasteful number, since it uses less digits than its factorization.

1242133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91219.

The product of its digits is 1728, while the sum is 24.

The square root of 1242133431 is about 35243.9133894067. The cubic root of 1242133431 is about 1074.9528534578.

Adding to 1242133431 its reverse (1343312421), we get a palindrome (2585445852).

The spelling of 1242133431 in words is "one billion, two hundred forty-two million, one hundred thirty-three thousand, four hundred thirty-one".