1597654212 has 180 divisors, whose sum is σ = 4812028368. Its totient is φ = 409130400.

The previous prime is 1597654199. The next prime is 1597654241. The reversal of 1597654212 is 2124567951.

It is a super-2 number, since 2×1597654212² = 5104997962242681888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 22502137 + ... + 22502207.

Almost surely, 2^1597654212 is an apocalyptic number.

1597654212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1597654212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406014184).

1597654212 is an abundant number, since it is smaller than the sum of its proper divisors (3214374156).

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

1597654212 is an equidigital number, since it uses as much as digits as its factorization.

1597654212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 94 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 1597654212 is about 39970.6668946116. Note that the first 3 decimals coincide. The cubic root of 1597654212 is about 1169.0352219060.

The spelling of 1597654212 in words is "one billion, five hundred ninety-seven million, six hundred fifty-four thousand, two hundred twelve".