1951421 has 6 divisors (see below), whose sum is σ = 1985022. Its totient is φ = 1918200.

The previous prime is 1951403. The next prime is 1951429. The reversal of 1951421 is 1241591.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 19321 = 1390^2 + 139^2 .

It is not a de Polignac number, because 1951421 - 2¹⁸ = 1689277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13970 + ... + 14108.

It is an arithmetic number, because the mean of its divisors is an integer number (330837).

2^1951421 is an apocalyptic number.

It is an amenable number.

1951421 is a deficient number, since it is larger than the sum of its proper divisors (33601).

1951421 is an equidigital number, since it uses as much as digits as its factorization.

1951421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 240 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 1951421 is about 1396.9327113358. The cubic root of 1951421 is about 124.9636374231.

The spelling of 1951421 in words is "one million, nine hundred fifty-one thousand, four hundred twenty-one".