1951501 has 2 divisors, whose sum is σ = 1951502. Its totient is φ = 1951500.

The previous prime is 1951493. The next prime is 1951511. The reversal of 1951501 is 1051591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 5476 = 1395^2 + 74^2 .

It is an emirp because it is prime and its reverse (1051591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1951501 - 2³ = 1951493 is a prime.

1951501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1951511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975750 + 975751.

It is an arithmetic number, because the mean of its divisors is an integer number (975751).

2^1951501 is an apocalyptic number.

It is an amenable number.

1951501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951501 is an equidigital number, since it uses as much as digits as its factorization.

1951501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1951501 is about 1396.9613452061. The cubic root of 1951501 is about 124.9653450598.

The spelling of 1951501 in words is "one million, nine hundred fifty-one thousand, five hundred one".