1022521042 has 4 divisors (see below), whose sum is σ = 1533781566. Its totient is φ = 511260520.

The previous prime is 1022521021. The next prime is 1022521057. The reversal of 1022521042 is 2401252201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2401252201 = 631 ⋅3805471.

It can be written as a sum of positive squares in only one way, i.e., 936421201 + 86099841 = 30601^2 + 9279^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255630259 + ... + 255630262.

Almost surely, 2^1022521042 is an apocalyptic number.

1022521042 is a deficient number, since it is larger than the sum of its proper divisors (511260524).

1022521042 is an equidigital number, since it uses as much as digits as its factorization.

1022521042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511260523.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1022521042 is about 31976.8829312677. The cubic root of 1022521042 is about 1007.4513534258.

Adding to 1022521042 its reverse (2401252201), we get a palindrome (3423773243).

The spelling of 1022521042 in words is "one billion, twenty-two million, five hundred twenty-one thousand, forty-two".