1553421442 has 8 divisors (see below), whose sum is σ = 2334024000. Its totient is φ = 775413444.

The previous prime is 1553421433. The next prime is 1553421473. The reversal of 1553421442 is 2441243551.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 647142 + ... + 649537.

It is an arithmetic number, because the mean of its divisors is an integer number (291753000).

Almost surely, 2^1553421442 is an apocalyptic number.

1553421442 is a deficient number, since it is larger than the sum of its proper divisors (780602558).

1553421442 is a wasteful number, since it uses less digits than its factorization.

1553421442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297280.

The product of its digits is 19200, while the sum is 31.

The square root of 1553421442 is about 39413.4677743535. The cubic root of 1553421442 is about 1158.1454318238.

Adding to 1553421442 its reverse (2441243551), we get a palindrome (3994664993).

The spelling of 1553421442 in words is "one billion, five hundred fifty-three million, four hundred twenty-one thousand, four hundred forty-two".