1901620542 has 32 divisors (see below), whose sum is σ = 3971524608. Its totient is φ = 605866976.

The previous prime is 1901620537. The next prime is 1901620543. The reversal of 1901620542 is 2450261091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901620543) 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 in 15 ways as a sum of consecutive naturals, for example, 218323 + ... + 226865.

It is an arithmetic number, because the mean of its divisors is an integer number (124110144).

Almost surely, 2^1901620542 is an apocalyptic number.

1901620542 is an abundant number, since it is smaller than the sum of its proper divisors (2069904066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1901620542 is a wasteful number, since it uses less digits than its factorization.

1901620542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1901620542 is about 43607.5743650114. The cubic root of 1901620542 is about 1238.9143597886.

The spelling of 1901620542 in words is "one billion, nine hundred one million, six hundred twenty thousand, five hundred forty-two".