1522420378 has 4 divisors (see below), whose sum is σ = 2283630570. Its totient is φ = 761210188.

The previous prime is 1522420373. The next prime is 1522420379. The reversal of 1522420378 is 8730242251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8730242251 = 1733 ⋅5037647.

It can be written as a sum of positive squares in only one way, i.e., 1381831929 + 140588449 = 37173^2 + 11857^2 .

It is not an unprimeable number, because it can be changed into a prime (1522420373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380605093 + ... + 380605096.

Almost surely, 2^1522420378 is an apocalyptic number.

1522420378 is a deficient number, since it is larger than the sum of its proper divisors (761210192).

1522420378 is an equidigital number, since it uses as much as digits as its factorization.

1522420378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761210191.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1522420378 is about 39018.2057250202. The cubic root of 1522420378 is about 1150.3893774090.

The spelling of 1522420378 in words is "one billion, five hundred twenty-two million, four hundred twenty thousand, three hundred seventy-eight".