7142430921 has 8 divisors (see below), whose sum is σ = 9526927104. Its totient is φ = 4759777680.

The previous prime is 7142430877. The next prime is 7142430943. The reversal of 7142430921 is 1290342417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7142430921 - 2⁹ = 7142430409 is a prime.

It is a super-2 number, since 2×7142430921² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7142430121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451666 + ... + 467211.

It is an arithmetic number, because the mean of its divisors is an integer number (1190865888).

Almost surely, 2^7142430921 is an apocalyptic number.

It is an amenable number.

7142430921 is a deficient number, since it is larger than the sum of its proper divisors (2384496183).

7142430921 is a wasteful number, since it uses less digits than its factorization.

7142430921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921471.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 7142430921 is about 84512.9038727223. The cubic root of 7142430921 is about 1925.8184788203.

The spelling of 7142430921 in words is "seven billion, one hundred forty-two million, four hundred thirty thousand, nine hundred twenty-one".