1242299534 has 32 divisors (see below), whose sum is σ = 2251238400. Its totient is φ = 502256160.

The previous prime is 1242299507. The next prime is 1242299551. The reversal of 1242299534 is 4359922421.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1242299491 and 1242299500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53804 + ... + 73344.

It is an arithmetic number, because the mean of its divisors is an integer number (70351200).

Almost surely, 2^1242299534 is an apocalyptic number.

1242299534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1242299534 is a deficient number, since it is larger than the sum of its proper divisors (1008938866).

1242299534 is a wasteful number, since it uses less digits than its factorization.

1242299534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808.

The product of its digits is 155520, while the sum is 41.

The square root of 1242299534 is about 35246.2697884471. The cubic root of 1242299534 is about 1075.0007669726. Note that the first 3 decimals are identical.

The spelling of 1242299534 in words is "one billion, two hundred forty-two million, two hundred ninety-nine thousand, five hundred thirty-four".