1351220432 has 40 divisors (see below), whose sum is σ = 2711645640. Its totient is φ = 651499520.

The previous prime is 1351220417. The next prime is 1351220441. The reversal of 1351220432 is 2340221531.

It can be written as a sum of positive squares in 4 ways, for example, as 41938576 + 1309281856 = 6476^2 + 36184^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1351220398 and 1351220407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552332 + ... + 554772.

It is an arithmetic number, because the mean of its divisors is an integer number (67791141).

Almost surely, 2^1351220432 is an apocalyptic number.

It is an amenable number.

1351220432 is an abundant number, since it is smaller than the sum of its proper divisors (1360425208).

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

1351220432 is a wasteful number, since it uses less digits than its factorization.

1351220432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671 (or 3665 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1351220432 is about 36758.9503658633. The cubic root of 1351220432 is about 1105.5423944622.

Adding to 1351220432 its reverse (2340221531), we get a palindrome (3691441963).

The spelling of 1351220432 in words is "one billion, three hundred fifty-one million, two hundred twenty thousand, four hundred thirty-two".