1425749 has 4 divisors (see below), whose sum is σ = 1535436. Its totient is φ = 1316064.

The previous prime is 1425733. The next prime is 1425757. The reversal of 1425749 is 9475241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9475241 = 23 ⋅411967.

It can be written as a sum of positive squares in 2 ways, for example, as 255025 + 1170724 = 505^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425749 - 2⁴ = 1425733 is a prime.

It is a super-2 number, since 2×1425749² = 4065520422002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54824 + ... + 54849.

It is an arithmetic number, because the mean of its divisors is an integer number (383859).

2^1425749 is an apocalyptic number.

It is an amenable number.

1425749 is a deficient number, since it is larger than the sum of its proper divisors (109687).

1425749 is a wasteful number, since it uses less digits than its factorization.

1425749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109686.

The product of its digits is 10080, while the sum is 32.

The square root of 1425749 is about 1194.0473189954. The cubic root of 1425749 is about 112.5505682129.

The spelling of 1425749 in words is "one million, four hundred twenty-five thousand, seven hundred forty-nine".