1021807242 has 12 divisors (see below), whose sum is σ = 2213915730. Its totient is φ = 340602408.

The previous prime is 1021807231. The next prime is 1021807243. The reversal of 1021807242 is 2427081201.

It can be written as a sum of positive squares in only one way, i.e., 794732481 + 227074761 = 28191^2 + 15069^2 .

It is not an unprimeable number, because it can be changed into a prime (1021807243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28383517 + ... + 28383552.

Almost surely, 2^1021807242 is an apocalyptic number.

1021807242 is an abundant number, since it is smaller than the sum of its proper divisors (1192108488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021807242 is a wasteful number, since it uses less digits than its factorization.

1021807242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56767077 (or 56767074 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1021807242 is about 31965.7197948052. The cubic root of 1021807242 is about 1007.2168721306.

Adding to 1021807242 its reverse (2427081201), we get a palindrome (3448888443).

The spelling of 1021807242 in words is "one billion, twenty-one million, eight hundred seven thousand, two hundred forty-two".