1213401402 has 24 divisors (see below), whose sum is σ = 2660714784. Its totient is φ = 399593544.

The previous prime is 1213401377. The next prime is 1213401403. The reversal of 1213401402 is 2041043121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1213401403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404598 + ... + 407585.

It is an arithmetic number, because the mean of its divisors is an integer number (110863116).

Almost surely, 2^1213401402 is an apocalyptic number.

1213401402 is an abundant number, since it is smaller than the sum of its proper divisors (1447313382).

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

1213401402 is a wasteful number, since it uses less digits than its factorization.

1213401402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812274 (or 812271 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1213401402 is about 34833.9116666504. The cubic root of 1213401402 is about 1066.5997989115.

Adding to 1213401402 its reverse (2041043121), we get a palindrome (3254444523).

The spelling of 1213401402 in words is "one billion, two hundred thirteen million, four hundred one thousand, four hundred two".