1242551429 has 12 divisors (see below), whose sum is σ = 1470721824. Its totient is φ = 1028313552.

The previous prime is 1242551399. The next prime is 1242551461. The reversal of 1242551429 is 9241552421.

It is a de Polignac number, because none of the positive numbers 2^k-1242551429 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242551489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99647 + ... + 111420.

It is an arithmetic number, because the mean of its divisors is an integer number (122560152).

Almost surely, 2^1242551429 is an apocalyptic number.

It is an amenable number.

1242551429 is a deficient number, since it is larger than the sum of its proper divisors (228170395).

1242551429 is an equidigital number, since it uses as much as digits as its factorization.

1242551429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211132 (or 211103 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 1242551429 is about 35249.8429641892. The cubic root of 1242551429 is about 1075.0734196114.

The spelling of 1242551429 in words is "one billion, two hundred forty-two million, five hundred fifty-one thousand, four hundred twenty-nine".