1252220542 has 4 divisors (see below), whose sum is σ = 1878330816. Its totient is φ = 626110270.

The previous prime is 1252220531. The next prime is 1252220573. The reversal of 1252220542 is 2450222521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2450222521 = 181 ⋅13537141.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313055134 + ... + 313055137.

It is an arithmetic number, because the mean of its divisors is an integer number (469582704).

Almost surely, 2^1252220542 is an apocalyptic number.

1252220542 is a deficient number, since it is larger than the sum of its proper divisors (626110274).

1252220542 is an equidigital number, since it uses as much as digits as its factorization.

1252220542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626110273.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1252220542 is about 35386.7283313957. The cubic root of 1252220542 is about 1077.8548360401.

The spelling of 1252220542 in words is "one billion, two hundred fifty-two million, two hundred twenty thousand, five hundred forty-two".