1372421 has 2 divisors, whose sum is σ = 1372422. Its totient is φ = 1372420.

The previous prime is 1372417. The next prime is 1372451. The reversal of 1372421 is 1242731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 448900 = 961^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372421 - 2² = 1372417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1372393 and 1372402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686210 + 686211.

It is an arithmetic number, because the mean of its divisors is an integer number (686211).

2^1372421 is an apocalyptic number.

It is an amenable number.

1372421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372421 is an equidigital number, since it uses as much as digits as its factorization.

1372421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 1372421 is about 1171.5037345224. The cubic root of 1372421 is about 111.1294380510.

The spelling of 1372421 in words is "one million, three hundred seventy-two thousand, four hundred twenty-one".