1242298869 has 16 divisors (see below), whose sum is σ = 1992660480. Its totient is φ = 672522480.

The previous prime is 1242298861. The next prime is 1242298873. The reversal of 1242298869 is 9688922421.

It is not a de Polignac number, because 1242298869 - 2³ = 1242298861 is a prime.

It is a super-2 number, since 2×1242298869² = 3086612959837358322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242298861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556367 + ... + 1557164.

It is an arithmetic number, because the mean of its divisors is an integer number (124541280).

Almost surely, 2^1242298869 is an apocalyptic number.

1242298869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1242298869 is a deficient number, since it is larger than the sum of its proper divisors (750361611).

1242298869 is a wasteful number, since it uses less digits than its factorization.

1242298869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113560.

The product of its digits is 995328, while the sum is 51.

The square root of 1242298869 is about 35246.2603548235. The cubic root of 1242298869 is about 1075.0005751574. Note that the first 3 decimals are identical.

The spelling of 1242298869 in words is "one billion, two hundred forty-two million, two hundred ninety-eight thousand, eight hundred sixty-nine".