1101998542 has 4 divisors (see below), whose sum is σ = 1652997816. Its totient is φ = 550999270.

The previous prime is 1101998503. The next prime is 1101998549. The reversal of 1101998542 is 2458991011.

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 = 1101998495 and 1101998504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101998549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275499634 + ... + 275499637.

It is an arithmetic number, because the mean of its divisors is an integer number (413249454).

Almost surely, 2^1101998542 is an apocalyptic number.

1101998542 is a deficient number, since it is larger than the sum of its proper divisors (550999274).

1101998542 is an equidigital number, since it uses as much as digits as its factorization.

1101998542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550999273.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1101998542 is about 33196.3633851662. The cubic root of 1101998542 is about 1032.9049054567.

It can be divided in two parts, 11019 and 98542, that added together give a square (109561 = 331²).

The spelling of 1101998542 in words is "one billion, one hundred one million, nine hundred ninety-eight thousand, five hundred forty-two".