1201998345 has 32 divisors (see below), whose sum is σ = 2044880640. Its totient is φ = 600821760.

The previous prime is 1201998337. The next prime is 1201998359. The reversal of 1201998345 is 5438991021.

It is not a de Polignac number, because 1201998345 - 2³ = 1201998337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201998297 and 1201998306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51676 + ... + 71234.

It is an arithmetic number, because the mean of its divisors is an integer number (63902520).

Almost surely, 2^1201998345 is an apocalyptic number.

1201998345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201998345 is a deficient number, since it is larger than the sum of its proper divisors (842882295).

1201998345 is a wasteful number, since it uses less digits than its factorization.

1201998345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19825.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1201998345 is about 34669.8477787255. The cubic root of 1201998345 is about 1063.2481193908.

The spelling of 1201998345 in words is "one billion, two hundred one million, nine hundred ninety-eight thousand, three hundred forty-five".