1397100042 has 32 divisors (see below), whose sum is σ = 3343488960. Its totient is φ = 429876720.

The previous prime is 1397100041. The next prime is 1397100049. The reversal of 1397100042 is 2400017931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1397099979 and 1397100015.

It is not an unprimeable number, because it can be changed into a prime (1397100041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994384 + ... + 995787.

It is an arithmetic number, because the mean of its divisors is an integer number (104484030).

Almost surely, 2^1397100042 is an apocalyptic number.

1397100042 is an abundant number, since it is smaller than the sum of its proper divisors (1946388918).

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

1397100042 is a wasteful number, since it uses less digits than its factorization.

1397100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990195 (or 1990189 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1397100042 is about 37377.8014602250. The cubic root of 1397100042 is about 1117.9159912469.

Adding to 1397100042 its reverse (2400017931), we get a palindrome (3797117973).

The spelling of 1397100042 in words is "one billion, three hundred ninety-seven million, one hundred thousand, forty-two".