1621625342 has 16 divisors (see below), whose sum is σ = 2617747632. Its totient is φ = 750606720.

The previous prime is 1621625323. The next prime is 1621625353. The reversal of 1621625342 is 2435261261.

It is a junction number, because it is equal to n+sod(n) for n = 1621625299 and 1621625308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388868 + ... + 393015.

It is an arithmetic number, because the mean of its divisors is an integer number (163609227).

Almost surely, 2^1621625342 is an apocalyptic number.

1621625342 is a deficient number, since it is larger than the sum of its proper divisors (996122290).

1621625342 is a wasteful number, since it uses less digits than its factorization.

1621625342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781963.

The product of its digits is 17280, while the sum is 32.

The square root of 1621625342 is about 40269.4095064728. The cubic root of 1621625342 is about 1174.8529387700.

The spelling of 1621625342 in words is "one billion, six hundred twenty-one million, six hundred twenty-five thousand, three hundred forty-two".