1355642042 has 4 divisors (see below), whose sum is σ = 2033463066. Its totient is φ = 677821020.

The previous prime is 1355642023. The next prime is 1355642051. The reversal of 1355642042 is 2402465531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1236155281 + 119486761 = 35159^2 + 10931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338910509 + ... + 338910512.

Almost surely, 2^1355642042 is an apocalyptic number.

1355642042 is a deficient number, since it is larger than the sum of its proper divisors (677821024).

1355642042 is an equidigital number, since it uses as much as digits as its factorization.

1355642042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677821023.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1355642042 is about 36819.0445557730. The cubic root of 1355642042 is about 1106.7469733944.

The spelling of 1355642042 in words is "one billion, three hundred fifty-five million, six hundred forty-two thousand, forty-two".