1020154642 has 24 divisors (see below), whose sum is σ = 1673141184. Its totient is φ = 466253424.

The previous prime is 1020154637. The next prime is 1020154643. The reversal of 1020154642 is 2464510201.

It is a happy number.

1020154642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1020154643) 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, 20163 + ... + 49465.

It is an arithmetic number, because the mean of its divisors is an integer number (69714216).

Almost surely, 2^1020154642 is an apocalyptic number.

1020154642 is a deficient number, since it is larger than the sum of its proper divisors (652986542).

1020154642 is a wasteful number, since it uses less digits than its factorization.

1020154642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29434 (or 29421 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1020154642 is about 31939.8597680077. The cubic root of 1020154642 is about 1006.6735782800.

Adding to 1020154642 its reverse (2464510201), we get a palindrome (3484664843).

The spelling of 1020154642 in words is "one billion, twenty million, one hundred fifty-four thousand, six hundred forty-two".