1242691043 has 8 divisors (see below), whose sum is σ = 1360820736. Its totient is φ = 1125421000.

The previous prime is 1242691027. The next prime is 1242691057. The reversal of 1242691043 is 3401962421.

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

It is not a de Polignac number, because 1242691043 - 2⁴ = 1242691027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242691343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211883 + ... + 217668.

It is an arithmetic number, because the mean of its divisors is an integer number (170102592).

Almost surely, 2^1242691043 is an apocalyptic number.

1242691043 is a deficient number, since it is larger than the sum of its proper divisors (118129693).

1242691043 is a wasteful number, since it uses less digits than its factorization.

1242691043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429825.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1242691043 is about 35251.8232578118. The cubic root of 1242691043 is about 1075.1136834523.

The spelling of 1242691043 in words is "one billion, two hundred forty-two million, six hundred ninety-one thousand, forty-three".