1351321400 has 192 divisors, whose sum is σ = 3793819680. Its totient is φ = 440985600.

The previous prime is 1351321373. The next prime is 1351321409. The reversal of 1351321400 is 41231531.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351321409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057562 + ... + 1058838.

Almost surely, 2^1351321400 is an apocalyptic number.

1351321400 is a gapful number since it is divisible by the number (10) 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 1351321400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896909840).

1351321400 is an abundant number, since it is smaller than the sum of its proper divisors (2442498280).

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

1351321400 is a wasteful number, since it uses less digits than its factorization.

1351321400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1351321400 is about 36760.3237200110. The cubic root of 1351321400 is about 1105.5699304639.

Adding to 1351321400 its reverse (41231531), we get a palindrome (1392552931).

The spelling of 1351321400 in words is "one billion, three hundred fifty-one million, three hundred twenty-one thousand, four hundred".