1202153421 has 16 divisors (see below), whose sum is σ = 1881363584. Its totient is φ = 668378304.

The previous prime is 1202153417. The next prime is 1202153437. The reversal of 1202153421 is 1243512021.

It is not a de Polignac number, because 1202153421 - 2² = 1202153417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202153411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772810 + ... + 774363.

It is an arithmetic number, because the mean of its divisors is an integer number (117585224).

Almost surely, 2^1202153421 is an apocalyptic number.

It is an amenable number.

1202153421 is a deficient number, since it is larger than the sum of its proper divisors (679210163).

1202153421 is a wasteful number, since it uses less digits than its factorization.

1202153421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547220.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1202153421 is about 34672.0841744479. The cubic root of 1202153421 is about 1063.2938424640.

Adding to 1202153421 its reverse (1243512021), we get a palindrome (2445665442).

The spelling of 1202153421 in words is "one billion, two hundred two million, one hundred fifty-three thousand, four hundred twenty-one".