1542421445 has 4 divisors (see below), whose sum is σ = 1850905740. Its totient is φ = 1233937152.

The previous prime is 1542421421. The next prime is 1542421451. The reversal of 1542421445 is 5441242451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5441242451 = 97 ⋅56095283.

It can be written as a sum of positive squares in 2 ways, for example, as 914518081 + 627903364 = 30241^2 + 25058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542421445 - 2⁶ = 1542421381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154242140 + ... + 154242149.

It is an arithmetic number, because the mean of its divisors is an integer number (462726435).

Almost surely, 2^1542421445 is an apocalyptic number.

It is an amenable number.

1542421445 is a deficient number, since it is larger than the sum of its proper divisors (308484295).

1542421445 is an equidigital number, since it uses as much as digits as its factorization.

1542421445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308484294.

The product of its digits is 25600, while the sum is 32.

The square root of 1542421445 is about 39273.6736886174. The cubic root of 1542421445 is about 1155.4052899490.

Adding to 1542421445 its reverse (5441242451), we get a palindrome (6983663896).

The spelling of 1542421445 in words is "one billion, five hundred forty-two million, four hundred twenty-one thousand, four hundred forty-five".