1621537342 has 4 divisors (see below), whose sum is σ = 2432306016. Its totient is φ = 810768670.

The previous prime is 1621537277. The next prime is 1621537361. The reversal of 1621537342 is 2437351261.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1621537298 and 1621537307.

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, 405384334 + ... + 405384337.

It is an arithmetic number, because the mean of its divisors is an integer number (608076504).

Almost surely, 2^1621537342 is an apocalyptic number.

1621537342 is a deficient number, since it is larger than the sum of its proper divisors (810768674).

1621537342 is an equidigital number, since it uses as much as digits as its factorization.

1621537342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810768673.

The product of its digits is 30240, while the sum is 34.

The square root of 1621537342 is about 40268.3168508444. The cubic root of 1621537342 is about 1174.8316866501.

The spelling of 1621537342 in words is "one billion, six hundred twenty-one million, five hundred thirty-seven thousand, three hundred forty-two".