1242651151 has 16 divisors (see below), whose sum is σ = 1473630208. Its totient is φ = 1025395200.

The previous prime is 1242651143. The next prime is 1242651173. The reversal of 1242651151 is 1511562421.

It is a cyclic number.

It is not a de Polignac number, because 1242651151 - 2³ = 1242651143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242651101) 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, 27046 + ... + 56716.

It is an arithmetic number, because the mean of its divisors is an integer number (92101888).

Almost surely, 2^1242651151 is an apocalyptic number.

1242651151 is a deficient number, since it is larger than the sum of its proper divisors (230979057).

1242651151 is a wasteful number, since it uses less digits than its factorization.

1242651151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29902.

The product of its digits is 2400, while the sum is 28.

The square root of 1242651151 is about 35251.2574385652. The cubic root of 1242651151 is about 1075.1021791464.

The spelling of 1242651151 in words is "one billion, two hundred forty-two million, six hundred fifty-one thousand, one hundred fifty-one".